In debates about animal sentience, the precautionary principle is often invoked. The idea is that when the evidence of sentience is inconclusive, we should “give the animal the benefit of the doubt” or “err on the side of caution” in formulating animal protection legislation. Yet there remains confusion as to whether it is appropriate to apply the precautionary principle in this context, and, if so, what “applying the precautionary principle” means in practice regarding the burden of proof for (...) animal sentience. Here I construct a version of the precautionary principle tailored to the question of animal sentience together with a practical framework for implementing it. I explain and defend the key features of this framework, argue that it is well-aligned with current practice in animal welfare science, and consider and reject a number of influential counterarguments to the use of precautionary reasoning in this area. (shrink)

One of the primary concerns in animal research is ensuring the welfare of laboratory animals. Modern views on animal welfare emphasize the role of animal sentience, i.e. the capacity to experience subjective states such as pleasure or suffering, as a central component of welfare. The increasing official recognition of animal sentience has had large effects on laboratory animal research. The Cambridge Declaration on Consciousness (Low et al., University of Cambridge, 2012) marked an official scientific recognition of the presence (...) of sentience in mammals, birds, and cephalopods. Animal sentience has furthermore been recognized in legislation in the European Union, UK, New Zealand and parts of Australia, with discussions underway in other parts of the world to follow suit. In this paper, we analyze this shift towards recognition of sentience in the regulation and practice in the treatment of laboratory animals and its effects on animal welfare and use. (shrink)

‘Sentience’ sometimes refers to the capacity for any type of subjective experience, and sometimes to the capacity to have subjective experiences with a positive or negative valence, such as pain or pleasure. We review recent controversies regarding sentience in fish and invertebrates and consider the deep methodological challenge posed by these cases. We then present two ways of responding to the challenge. In a policy-making context, precautionary thinking can help us treat animals appropriately despite continuing uncertainty about their (...) sentience. In a scientific context, we can draw inspiration from the science of human consciousness to disentangle conscious and unconscious perception (especially vision) in animals. Developing better ways to disentangle conscious and unconscious affect is a key priority for future research. (shrink)

This essay addresses Cartesian duality and how its implicit dialectic might be repaired using physics and information theory. Our agenda is to describe a key distinction in the physical sciences that may provide a foundation for the distinction between mind and matter, and between sentient and intentional systems. From this perspective, it becomes tenable to talk about the physics of sentience and ‘forces’ that underwrite our beliefs (in the sense of probability distributions represented by our internal states), which may (...) ground our mental states and consciousness. We will refer to this view as Markovian monism, which entails two claims: (1) fundamentally, there is only one type of thing and only one type of irreducible property (hence monism). (2) All systems possessing a Markov blanket have properties that are relevant for understanding the mind and consciousness: if such systems have mental properties, then they have them partly by virtue of possessing a Markov blanket (hence Markovian). Markovian monism rests upon the information geometry of random dynamic systems. In brief, the information geometry induced in any system—whose internal states can be distinguished from external states—must acquire a dual aspect. This dual aspect concerns the (intrinsic) information geometry of the probabilistic evolution of internal states and a separate (extrinsic) information geometry of probabilistic beliefs about external states that are parameterised by internal states. We call these intrinsic (i.e., mechanical, or state-based) and extrinsic (i.e., Markovian, or belief-based) information geometries, respectively. Although these mathematical notions may sound complicated, they are fairly straightforward to handle, and may offer a means through which to frame the origins of consciousness. (shrink)

A reductionistic, bottom‐up, cellular‐based concept of the origins of sentience and consciousness has been put forward. Because all life is based on cells, any evolutionary theory of the emergence of sentience and consciousness must be grounded in mechanisms that take place in prokaryotes, the simplest unicellular species. It has been posited that subjective awareness is a fundamental property of cellular life. It emerges as an inherent feature of, and contemporaneously with, the very first life‐forms. All other varieties of (...) mentation are the result of evolutionary mechanisms based on this singular event. Therefore, all forms of sentience and consciousness evolve from this original instantiation in prokaryotes. It has also been identified that three cellular structures and mechanisms that likely play critical roles here are excitable membranes, oscillating cytoskeletal polymers, and structurally flexible proteins. Finally, basic biophysical principles are proposed to guide those processes that underly the emergence of supracellular sentience from cellular sentience in multicellular organisms. (shrink)

This paper explores the ontological bases for ethical behaviour between human animals and non-human animals drawing on phenomenology and Buddhist philosophy. Alongside Singer and utilitarianism, I argue that ethical behaviour regarding animals is most effectively justified and motivated by considerations of sentience. Nonetheless, utilitarianism misses crucial aspects of sentience. Buddhist ethics is from the beginning focused on all sentient beings, not solely humans. This inclusivity, and refined interrogations of suffering, means it can furnish more nuanced understandings of (...) class='Hi'>sentience. For phenomenology, sentience includes the capacities for self-awareness and, I will argue, a plural self-awareness; the ‘I’ belongs to a ‘we’, and the ‘we’ is constitutive of the ‘I’. This ‘primordial we’ provides the basis for rethinking the moral relations between human animals and non-human animals. I contend finally we thus have an ontological basis in ‘interanimality’ to explain why we most often do and should care about all sentient beings. (shrink)

This article examines the nature of affective states across biological taxa. It argues that affect constitutes a primary form of consciousness. Creatures capable of affect are sentient of their bodily states and can behave in ways intended to maintain or restore them to a homeostatic range. After reviewing and critiquing neurobiological and philosophical theories of the evolution of consciousness, this article argues that some possible creatures are limited to self‐directed affective states, even if those creatures are capable of exteroception. Such (...) creatures enjoysolipsistic sentience: awareness of their own selves and bodily demands, but unawareness of their exogenous environments. (shrink)

Timothy Hsiao argues that animals lack moral status because they lack the capacity for the sort of higher-level rationality required for membership in the moral community. Stijn Bruers and László Erdős have already raised a number of objections to this argument, to which Hsiao has replied with some success. But I think a stronger critique can be made. Here I raise further objections to three aspects of Hsiao's view: his conception of the moral community, his idea of root capacities grounded (...) in one's nature, and his explanation of why cruelty is wrong. I also argue that sentience is a more plausible candidate for the morally salient capacity than rationality. (shrink)

I discuss whether "sentience" (i.e., phenomenal consciousness) comes in degrees.

This interview with Peter Singer AI serves a dual purpose. It is an exploration of certain—utilitarian and related—views on sentience and its ethical implications. It is also an exercise in the emerging interaction between natural and artificial intelligence, presented not as just ethics of AI but perhaps more importantly, as ethics with AI. The one asking the questions—Matti Häyry—is a person, in the contemporary sense of the word, sentient and self-aware, whereas Peter Singer AI is an artificial intelligence persona, (...) created by Sankalpa Ghose, a person, through dialogue with Peter Singer, a person, to programmatically model and incorporate the latter’s writings, presentations, recipes, and character qualities as a renowned philosopher. The interview indicates some subtle differences between natural perspectives and artificial representation, suggesting directions for further development. PSai, as the project is also known, is available to anyone to chat with, anywhere in the world, on almost any topic, in almost any language, at www.petersinger.ai. (shrink)

The use of nonhuman animals as models in research and drug testing is a key route through which contemporary scientific knowledge is certified. Given ethical concerns, regulation of animal research promotes the use of less “sentient” animals. This paper draws on a documentary analysis of legal documents and qualitative interviews with Named Veterinary Surgeons and others at a commercial laboratory in the UK. Its key claim is that the concept of animal sentience is entangled with a particular imaginary of (...) how the general public or wider society views animals. We call this imaginary societal sentience. Against a backdrop of increasing ethnographic work on care encounters in the laboratory, this concept helps to stress the wider context within which such encounters take place. We conclude that societal sentience has potential purchase beyond the animal research field, in helping to highlight the affective dimension of public imaginaries and their ethical consequences. Researching and critiquing societal sentience, we argue, may ultimately have more impact on the fate of humans and nonhumans in the laboratory than focusing wholly on ethics as situated practice. (shrink)

The study of plant signaling and behaviour, whose aim is to address the physiological basis for adaptive behaviour in plants, is a growing and thought-provoking field of research. In this review we discuss relevant studies that try to interpret in a neurocognitive fashion cases in which plants seem to behave similarly to animals. By comparing observations and experiments about plants and animals, we propose a framework composed of three axes in which interactions of living organisms with the world can be (...) represented. The first axis refers to adaptiveness, the second to sensitivity, and the third to sentience. This model allows us to interpret the behaviours of living organisms along a continuum capable of giving a smooth transition from simple to complex responses. In light of this, plants show an excellent adaptiveness, a variable level of sensitivity, and a good degree of sentience (restricted to the immediate perception that something is happening to themselves). Only the organisms with a high degree of sentience can have the basis for developing consciousness. However, even though it is necessary for consciousness, sentience is not sufficient, as it must be associated with a complex functional organization of structures that can support a recursive and synchronized processing of information. So far, plants have been found to completely lack this type of organization. Plants appear to be, therefore, sentient but not conscious. (shrink)

We have structured our response according to five questions arising from the commentaries: (i) What is sentience? (ii) Is sentience a necessary or sufficient condition for moral standing? (iii) What methods should guide comparative cognitive research in general, and specifically in studying invertebrates? (iv) How should we balance scientific uncertainty and moral risk? (v) What practical strategies can help reduce biases and morally dismissive attitudes toward invertebrates?

I sketch briefly some of the more influential theories concerned with the moral status of nonhuman animals, highlighting their biological/physiological aspects. I then survey the most prominent empirical research on the physiological and cognitive capacities of nonhuman animals, focusing primarily on sentience, but looking also at a few other morally relevant capacities such as self-awareness, memory, and mindreading. Lastly, I discuss two examples of current animal welfare policy, namely, animals used in industrialized food production and in scientific research. I (...) argue that even the most progressive current welfare policies lag behind, are ignorant of, or arbitrarily disregard the science on sentience and cognition. (shrink)

Recent arguments in plant biology that claim to be uncovering the scientific basis for sentience in plants are grounded on assumptions that have not been sufficiently scrutinized. This paper focuses on two assumptions in particular – the semantic assumption that psychological predicates are non-rigid and hence can be extended to plants, and the assumption that Darwinian gradualism is inconsistent with consciousness emerging at a specific place on the phylogenetic tree. We interrogate both assumptions, advocating that a careful semantic analysis (...) of psychological predicates does not warrant their extension to plants on the available evidence, and that gradualism and emergentism, properly construed, are not inconsistent. (shrink)

The attribution of sentience or consciousness to plants is currently a topic of debate among biologists and philosophers. The claim that plants are conscious is based on three arguments: (i) plants, like all living organisms, are sentient (biopsychism); (ii) there is a strong analogy between the phloem transport system of plants and the nervous system of animals; and (iii) plants are the cognitive equals of sentient animals. On the basis of a model of consciousness that spells out criteria for (...) assigning sentience to a living organism and presents a diagnostic evolutionary marker of consciousness, we argue that these arguments are flawed and discuss some of the ethical issues they raise. (shrink)

The Animal Research Declaration is committed to establishing cohesive and rigorous ethical standards to safeguard the welfare of nonhuman primates, NHPs, engaged in neuroscience research (Petkov et al., 2022 this issue). As part of this mission, there is an expanding dialogue amongst neuroscientists, philosophers and policymakers, that is centred on diverse aspects of animal welfare and scientific practice. This paper emphasises the necessity of integrating the assessment of animal sentience into the declaration. Animal sentience, in this context, refers (...) to the recognised capacity that animals have for various kinds of subjective experience, with an associated positive or negative valence (Browning and Birch, 2022). Accordingly, NHP neuroscience researchers should work toward instituting a standardised approach for evaluating what can be termed "individual sentience profiles," representing the unique manner in which an individual NHP experiences specific events or environments. The adoption of this novel parameter would serve a triad of indispensable purposes: enhancing NHP welfare throughout research involvement, elevating the quality of life for NHPs in captivity, and refining the calibre of research outcomes. (shrink)

Veit suggests that the challenge of coordinating movement in multicellular organisms led to the evolution of a prioritizing value system, which rendered organisms complex enough to be sentient and drove the Cambrian explosion, while the absence of this evaluation system led to the demise of Ediacaran animals. In this commentary we criticize Veit’s terminology and evolutionary proposals, arguing that his terminology and evolutionary scenarios are problematic, and put forward alternative proposals. We suggest that sentience is a system property, and (...) that the evolution of sentience was the outcome of the evolution of open-ended associative learning, which included the coevolution of sensory, motor, memory, and value subsystems. We suggest that these coevolutionary system dynamics were a factor in the Cambrian explosion and contributed to the extinction of the Ediacaran biota. (shrink)

Segundo-Ortin & Calvo argue that plants have a surprisingly varied and complex behavioral repertoire. Which of these behavioral capacities are credible indicators of sentience? If we use the standards of evidence common in discussions of animal sentience, the behavioral capacities reviewed are insufficient evidence of sentience. Even if some putative indicators of animal sentience are present in plants, it is not clear whether what we should conclude is that plants are sentient or that those indicators are (...) inadequate. (shrink)

Can octopuses feel pain and pleasure? What about crabs, shrimps, insects, or spiders? How do we tell whether a person unresponsive after severe brain injury might be suffering? When does a fetus in the womb start to have conscious experiences? Could there even be rudimentary feelings in miniature models of the human brain, grown from human stem cells? And what about AI? These are questions about the edge of sentience, and they are subject to enormous, disorienting uncertainty. The stakes (...) are immense, and neglecting the risks can have terrible costs. We need to err on the side of caution, yet it’s often far from clear what ‘erring on the side of caution’ should mean in practice. When are we going too far? When are we not doing enough? The Edge of Sentience presents a comprehensive precautionary framework designed to help us reach ethically sound, evidence-based decisions despite our uncertainty. (shrink)

The recognition of animal sentience in law has created high expectations but has not yet lived up to them. In some jurisdictions, the recognition of animal sentience has formed the basis of new legal obligations imposed on humans to protect animal interests. So far, however, its potential has been limited because legal officials have interpreted sentience narrowly, as mainly referring to pain. This article proposes identifying other animal characteristics to better serve animal interests, namely sociability and agency. (...) These animal characteristics could, like sentience, be legally recognized by legislatures and receive normative force from the courts. This article argues that the legal recognition of sociability and agency could address animal exploitation and killing. Animal sociability and agency are already implicitly recognized by the law of most Western states, making it easier for them to be explicitly recognized in the future. Although these characteristics are already found in the law, they have the potential to be more disruptive than sentience because they have never served as the basis for the legal protection of animals. In other words, their potential as protective tools remains underexplored and underexploited. Moreover, sociability and agency more intuitively suggest normative implications because of their demanding nature. Acknowledging that a being is social and agential implies recognizing her need for social relationships and ensuring that her choices are fulfilled. This research article provides antispeciesist scholars and activists with a critical overview of new concepts around which some may wish to rally, particularly since the legal recognition of sentience has shown limits in multiple jurisdictions. This article explores the potential of legally recognizing sociability and agency by taking examples from the lives of dogs, cows, cats, horses, northern gannets, and dolphins. (shrink)

Sentience is the capacity to have feelings, such as feelings of pain, pleasure, hunger, thirst, warmth, joy, comfort and excitement. It is not simply the capacity to feel pain, but feelings of pain, distress or harm, broadly understood, have a special significance for animal welfare law. Drawing on over 300 scientific studies, we evaluate the evidence of sentience in two groups of invertebrate animals: the cephalopod molluscs or, for short, cephalopods (including octopods, squid and cuttlefish) and the decapod (...) crustaceans or, for short, decapods (including crabs, lobsters and crayfish). We also evaluate the potential welfare implications of current commercial practices involving these animals. (shrink)

In consciousness studies there is a growing tendency to consider experience as (i) fundamentally affective and (ii) deeply interlinked with interoceptive and homeostatic bodily processes. However, this view still needs further development to be part of any rigorous theory of consciousness. To advance in this direction, we ask: (1) is there any affective type that is always present in consciousness?, (2) is it related to interoception and homeostasis?, and (3) what are its properties? Here we analyse and compare Jim Russell's (...) core affect and Thomas Fuchs' concept of vitality, and propose a more encompassing notion that subsumes both: continuous organismic sentience. It provides affirmative answers to questions 1 and 2, and, regarding question 3, a preliminary list of thirteen properties divided into ontological, phenomenological, and functional categories. This is the first of a series of studies that will systematically address different notions of a fundamental, homeostatically-rooted affective type, to achieve a rigorous, unified concept for consciousness science. (shrink)

Many think that a specific aspect of phenomenal consciousness—valenced or affective experience—is essential to consciousness’s moral significance (valence sentientism). They hold that valenced experience is necessary for well-being, or moral status, or psychological intrinsic value (or all three). Some think that phenomenal consciousness generally is necessary for non-derivative moral significance (broad sentientism). Few think that consciousness is unnecessary for moral significance (non-necessitarianism). In this paper, I consider the prospects for these views. I first consider the prospects for valence sentientism in (...) light of Vulcans, beings who are conscious but without affect or valence of any sort. I think Vulcans pressure us to accept broad sentientism. But I argue that a consideration of explanations for broad sentientism opens up possible explanations for non-necessitarianism about the moral significance of consciousness. That is, once one leans away from valence sentientism because of Vulcans, one should feel pressure to accept a view on which consciousness is not necessary for well-being, moral status, or psychological intrinsic value. (shrink)

Environmental philosophers are often concerned to show that non-sentient things, such as plants or ecosystems, have interests and therefore are appropriate objects of moral concern. They deny that mentality is a necessary condition for having interests. Yet they also deny that they are committed to recognizing interests in things like machines. I argue that either machines have interests (and hence moral standing) too or mentality is a necessary condition for inclusion within the purview of morality. I go on to argue (...) that the aspect of mentality necessary for having interests is more complicated than mere sentience. (shrink)

The ethical debate on the moral consideration of non-human animals (hereafter animals) is currently centred on the evidence of sentience in these individuals. Legal protection for vertebrates and cephalopods (and decapods in the UK) has resulted from the recognition of sentience in these animals. Although one should celebrate the significant advances in the legal protection of animals in recent decades, current animal legislation is modulated by an instrumental viewpoint, remaining speciesist and anthropocentric. A sentient being is here understood (...) as one who has the phenomenological experience of awareness, which is the most basic sense of phenomenal consciousness that implies the existence of a subject who is not indifferent to what happens to itself. This paper demonstrates, with reasonable assumptions, that this concept of sentience would apply to many invertebrate species, thus deeming them worthy of increased moral consideration and legal protection. In cases in which sentience cannot be demonstrated clearly, one should assume the precautionary principle and consider the intrinsic value of each animal to designate moral consideration. In considering sentience as the primary condition for moral consideration, science must expand who is recognized as sentient rather than being reductionist. Animal ethics must review to whom the moral consideration should be given. Animal legislation must include legislative innovations and invertebrates in its protective scope. Thereby, a significant improvement in the current political and legislative decisions would be rooted in animal ethics. Opening the ethical perception and broadening the debate are urgent, as moral consideration should be given to all animals. (shrink)

Can a person’s degree of wellbeing be affected by things that do not enter her experience? Experientialists deny that it can, extra-experientialists affirm it. The debate between these two positions has focused on an argument against experientialism—the experience machine objection—but few arguments exist for it. I present an argument for experientialism. It builds on the claim that theories of wellbeing should not only state what constitutes wellbeing, but also which entities are welfare subjects. Moreover, the claims it makes about these (...) two issues should have a certain coherence with each other. I argue that if we accept a particular plausible answer to the second question—namely that all and only sentient beings are welfare subjects—extra-experientialist theories face a problem of coherence. While this problem can typically be solved, doing so will involve steps that are unattractive. On experientialist theories, on the other hand, the answer to these questions cohere perfectly. (shrink)

An accessible overview of Humphrey's evolving views on consciousness -- particularly the topic of phenomenal consciousness -- from his early neurophysiology studies in the 1960's to his debates with philosophers today.

The goal of this article is to bring together two fields of research — animal sentience research and animal welfare science — with the aim of advancing our understanding of animal emotions, especially their subjectively experienced or 'felt' component (feelings). While these two research areas share a common interest in animal feelings, they have had surprisingly little interaction. In this paper, we make a call for the integration of these fields and outline some of the ways in which work (...) done in each of these areas can inform and benefit the other, such as strengthening the theoretical and conceptual bases of both fields, and sharing methods used by each, advocating further future collaboration for the benefit of both disciplines. (shrink)

This article deals with the concept of sentience, and more specifically with the argument from sentience as it is used by utilitarians in the abortion debate and in the advocacy of animal rights. It is argued that sentience is more than feeling pleasure and pain (with empha sis on pain), and that pain is an inborn protection required to fit into the world rather than the substance of evil. S. Afr. J. Philos. Vol.23(3) 2004: 292-301.

Phenomenal consciousness appears to be particularly normatively significant. For this reason, sentience-based conceptions of ethics are widespread. In the field of animal ethics, knowing which animals are sentient appears to be essential to decide the moral status of these animals. I argue that, given that materialism is true of the mind, phenomenal consciousness is probably not particularly normatively significant. We should face up to this probable insignificance of phenomenal consciousness and move towards an ethic without sentience.

In this paper the permissibility of stem cell research on early human embryos is defended. It is argued that, in order to have moral status, an individual must have an interest in its own wellbeing. Sentience is a prerequisite for having an interest in avoiding pain, and personhood is a prerequisite for having an interest in the continuation of one's own existence. Early human embryos are not sentient and therefore they are not recipients of direct moral consideration. Early human (...) embryos do not satisfy the requirements for personhood, but there are arguments to the effect that they should be treated as persons nonetheless. These are the arguments from potentiality, symbolic value and the principle of human dignity. These arguments are challenged in this paper and it is claimed that they offer us no good reason to believe that early human embryos should be treated as persons. (shrink)

Original value -- Value incrementalism -- A normative proposal -- Valuing development -- The many faces of value -- Direct and indirect moral considerability -- Affirming moral theories -- Ethical vegetarianism? -- The possibility of an environmental ethic -- Racism and moral perfectionism -- The bankruptcy of moral relativism.

The explanatory challenge of sentience is known as the “hard problem of consciousness”: How does subjective experience arise from physical objects and their relations? Despite some optimistic claims, the perennial struggle with this question shows little evidence of imminent resolution. In this article I focus on the “why” rather than on the “how” of sentience. Specifically, why did sentience evolve in organic lifeforms? From an evolutionary perspective this question can be framed: “What adaptive problem(s) did organisms face (...) in their evolutionary past and how were those challenges met? I argue that sentience was a critical component of the adaptive solution (i.e., adopting an agentic stance) to increasingly complex and unpredictable demands placed on vertebrates approximately 500 million years ago (the so-called Cambrian explosion). One consequence of taking an agentic stance is that it freed the organism from its neural moorings, positioning it within phenomenal space outside its brain. (shrink)

It is fairly commonplace to think that the capacity for sentience need not be the only basis of moral status. Pluralists contend that moral status is grounded in several other valuable capacities as well as, or instead of, sentience, such as agency, empathy, or sociality. However, this contention contrasts with a standard assumption in animal ethics: that sentience should be the only basis of moral status. This article vindicates that assumption. Whilst classical utilitarians have defended a similar (...) claim about sentience in relation to ultimate value, the merits of this view have gone relatively unnoticed in contemporary debates about moral status and animal ethics. An account based on sentience alone avoids conceptual redundancy and has greater explanatory power than pluralist alternatives. An account of moral status based exclusively on sentience also yields two significant and revisionary implications that have not been recognised. First, the distinction between persons and nonpersons cannot hold, so all moral patients, including nonhuman animals, should feature as primary subjects in ethical theories, public policies, and research agendas. Second, we ought to favour nonhuman interests far more often than we tend to suppose. (shrink)

This book is about bridging the current deeply-held divide between sentience and reason. It focuses on the pragmatic role of sentient experience and its unceasing and inseparable interplay with the exercise of reason. Part I of the book deals first with the need for synthesizing the hitherto separate "truth-finding" knowledge traditions: the third-personal scientific-technological, and the first-personal humanistic-wisdom tradition. A conceptual framework for a mind reality is then proposed. Drawing from the unifying natural laws in current physical and biological (...) sciences, the mind reality is portrayed in terms of one interlocking open dynamic system with both a manifested and a covert aspect. In this entire system, each individual mind constantly "co-creates" and "co-evolves" with other collective or group minds at various levels. It is also presumed that the basic unit of interaction in the mind reality is thought or intent. Supporting evidence from psychology, parapsychology and the ancient perennial philosophies is presented. The second part of the book addresses the pragmatic consequences of the proposed mind reality. At the individual level, it is argued that sentient experience can serve the function of guiding, affirming and fostering an individual's life's work. A selection of existing first-personal accounts is presented to illustrate this point. At the collective level, the current dominant collective thought of "new capitalism" has the unfortunate consequences for humanity's sense of freedom, education and morality. Such consequences pertain to the "exteriorization" and the "deconstruction" of the intrinsic self and intrinsic values. To avoid this to happen, a collective effort at changing consciousness becomes necessary: the core task lies with the closure of the reason and sentience divide. (shrink)

Surely one of the most interesting problems in the study of mind concerns the nature of sentience. How is it that there are sensations, rather than merely sensings? What is it like to be a bat -- or why is it like anything at all? Why aren't we automata or responding but unfeeling Zombies? How does neural activity give rise to subjective experience? As Leibniz put the problem : _It must be confessed, however, that Perception_ [consciousness?]_, and that which (...) depends upon it, are_ _inexplicable by mechanical means, that is to say, by figures and motions. Supposing that there were a_ _machine whose structure produced thought, sensation, and perceptions, we could conceive of it as increased_ _in its interior size with the same proportions until one was able to enter into its interior, as he would into a_ _mill. Now, on going into it he would find only pieces working upon one another, but never would he find_ _anything to explain Perception._ [Montgomery trans.]. (shrink)

It would be unwise to dismiss the possibility of human brain organoids developing sentience. However, scepticism about this idea is appropriate when considering current organoids. It is a point of consensus that a brain-dead human is not sentient, and current organoids lack a functioning brainstem. There are nonetheless troubling early warning signs, suggesting organoid research may create forms of sentience in the near future. To err on the side of caution, researchers with very different views about the neural (...) basis of sentience should unite behind the “brainstem rule”: if a neural organoid develops or innervates a functioning brainstem that regulates arousal and leads to sleep-wake cycles, then it is a sentience candidate. If organoid research leads to the creation of sentience candidates, a moratorium or indefinite ban on the creation of the relevant type of organoid may be appropriate. A different way forward, more consistent with existing approaches to animal research, would be to require ethical review and harm-benefit analysis for all research on sentience candidates. (shrink)

According to a common view, sentience is necessary and sufficient for moral status. In other words, whether a being has intrinsic moral relevance is determined by its capacity for conscious experience. The _epistemic objection_ derives from our profound uncertainty about sentience. According to this objection, we cannot use sentience as a _criterion_ to ascribe moral status in practice because we won’t know in the foreseeable future which animals and AI systems are sentient while ethical questions regarding the (...) possession of moral status are urgent. Therefore, we need to formulate an alternative criterion. I argue that the epistemic objection is dissolved once one clearly distinguishes between the question what determines moral status and what criterion should be employed in practice to ascribe moral status. Epistemic concerns are irrelevant to the former question and—I will argue—criteria of moral status have inescapably to be based on sentience, if one concedes that sentience determines moral status. It follows that doubts about our epistemic access to sentience cannot be used to motivate an alternative criterion of moral status. If sentience turns out to be unknowable, then moral status is unknowable. However, I briefly advocate against such strong pessimism. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Fetal Sentience and Women’s RightsBonnie Steinbock (bio)A growing number of states have banned abortion after twenty weeks on the grounds that the fetus at that stage experiences pain. Such laws run contrary to current abortion law, and so are almost certain to be challenged in court. In Roe v. Wade the Supreme Court said that the constitutional right to abortion extends until the fetus is viable, between twenty-four (...) and twenty-eight weeks. After viability, states may ban abortion entirely except where continuing the pregnancy would threaten the woman’s life or health. The viability threshold was upheld in Planned Parenthood v. Casey.Why viability? The Roe court said that this is “the ‘compelling’ point... because the fetus then presumably has the capability of meaningful life outside the mother’s womb.” Some commentators point out that this is no justification; the capacity for independent life does not explain the significance of viability. It merely gives the meaning.Another problem with viability is that it seems to depend on medical technology. What if fetuses under twenty-three weeks could be placed in an artificial uterus and brought to development there? Would we then say that even a first-trimester fetus was viable? This focuses on one aspect of viability only—namely, the capacity for independent existence. Another aspect is development. The justification for viability is that a fetus of twenty-four to twenty-eight weeks is so substantially developed, so similar to a newborn, that it has a claim to societal protection—so long as this does not threaten the pregnant woman’s life or health. Any attempt to ban abortions much earlier in pregnancy—as in a bill passed by the Ohio state legislature in June that would ban abortion after a fetal heartbeat is detectable, which can occur as early as six weeks—would be so restrictive as to vitiate the right to abortion altogether.It could be argued that sentience is a more rational threshold than viability because of the connection between sentience and moral considerability. If, as many experts believe, sentience and viability occur around the same time, then from a practical standpoint, it does not matter whether sentience or viability is chosen. But if sentience is the standard, and if it occurs earlier than viability, then abortion rights are restricted. Thus, much of the debate has turned on when fetal sentience occurs. Some are adamant that fetal sentience prior to twenty-four weeks is impossible, but other researchers do not rule it out. The development of neural networks necessary for the experience of pain might be present as early as seventeen weeks.Opposition to these laws should not be based on when sentience occurs, since this might change with more evidence. All we can say now is that the fetus almost certainly cannot feel pain during the first trimester and almost certainly can during the third. The exact onset of sentience in the second trimester is not just unknown; it may even be unknowable. It depends on the development of neural connections, which is a process, not an event. Drawing any exact line within a process is likely to be arbitrary.The choice between sentience and viability to justify the prohibition of late abortions is not the real issue. What really matters—and what pro-choice advocates should stress—is that late abortions are not denied to women who need them to preserve their own lives or health. Roe makes this clear, and subsequent cases have affirmed it.That is what is so upsetting about the story of Danielle Deaver. Deaver was at twenty-two weeks in a wanted pregnancy when her water broke, and the amniotic fluid did not rebuild. Her doctors said that fetal development had stopped and that the fetus stood only a remote chance of being born alive. Deaver also faced a risk of serious infection. She and her husband opted for inducing labor. But because inducing labor, if not done to save the life of the fetus, is legally defined as abortion, and Nebraska law prohibits abortion after twenty weeks, doctors and hospital lawyers concluded that the procedure would be illegal.After ten days, Deaver went into labor... (shrink)

We address the moral importance of fish, invertebrates such as crustaceans, snails and insects, and other animals about which there is qualified scientific uncertainty about their sentience. We argue that, on a sentientist basis, one can at least say that how such animals fare make ethically significant claims on our character. It is a requirement of a morally decent (or virtuous) person that she at least pays attention to and is cautious regarding the possibly morally relevant aspects of such (...) animals. This involves having a moral stance, in the sense of patterns of perception, such that one notices such animals as being morally relevant in various situations. For the person who does not already consider these animals in this way, this could be a big change in moral psychology, and can be assumed to have behavioural consequences, albeit indeterminate. Character has been largely neglected in the literature, which focuses on act-centred approaches (i.e. that the evidence on sentience supports, or does not support, taking some specific action). We see our character-centred approach as complementary to, not superior to, act-centred approaches. Our approach has the advantage of allowing us to make ethically interesting and practically relevant claims about a wider range of cases, but it has the drawback of providing less specific action guidance. (shrink)