We revisit the analogy suggested by Madelung between a non-relativistic time-dependent quantum particle, to a fluid system which is pseudo-barotropic, irrotational and inviscid. We first discuss the hydrodynamical properties of the Madelung description in general, and extract a pressure like term from the Bohm potential. We show that the existence of a pressure gradient force in the fluid description, does not violate Ehrenfest’s theorem since its expectation value is zero. We also point out that incompressibility of the fluid implies conservation (...) of density along a fluid parcel trajectory and in 1D this immediately results in the non-spreading property of wave packets, as the sum of Bohm potential and an exterior potential must be either constant or linear in space. Next we relate to the hydrodynamic description a thermodynamic counterpart, taking the classical behavior of an adiabatic barotopric flow as a reference. We show that while the Bohm potential is not a positive definite quantity, as is expected from internal energy, its expectation value is proportional to the Fisher information whose integrand is positive definite. Moreover, this integrand is exactly equal to half of the square of the imaginary part of the momentum, as the integrand of the kinetic energy is equal to half of the square of the real part of the momentum. This suggests a relation between the Fisher information and the thermodynamic like internal energy of the Madelung fluid. Furthermore, it provides a physical linkage between the inverse of the Fisher information and the measure of disorder in quantum systems—in spontaneous adiabatic gas expansion the amount of disorder increases while the internal energy decreases. (shrink)

We argue that artificial networks are explainable and offer a novel theory of interpretability. Two sets of conceptual questions are prominent in theoretical engagements with artificial neural networks, especially in the context of medical artificial intelligence: Are networks explainable, and if so, what does it mean to explain the output of a network? And what does it mean for a network to be interpretable? We argue that accounts of “explanation” tailored specifically to neural networks have ineffectively reinvented the wheel. In (...) response to, we show how four familiar accounts of explanation apply to neural networks as they would to any scientific phenomenon. We diagnose the confusion about explaining neural networks within the machine learning literature as an equivocation on “explainability,” “understandability” and “interpretability.” To remedy this, we distinguish between these notions, and answer by offering a theory and typology of interpretation in machine learning. Interpretation is something one does to an explanation with the aim of producing another, more understandable, explanation. As with explanation, there are various concepts and methods involved in interpretation: Total or Partial, Global or Local, and Approximative or Isomorphic. Our account of “interpretability” is consistent with uses in the machine learning literature, in keeping with the philosophy of explanation and understanding, and pays special attention to medical artificial intelligence systems. (shrink)

Philosophical Issues, Volume 31, Issue 1, Page 85-103, October 2021.

According to the Fine-Tuning Argument, the existence of life in our universe confirms the Multiverse Hypothesis. A standard objection to FTA is that it violates the Requirement of Total Evidence. I argue that RTE should be rejected in favor of the Predesignation Requirement, according to which, in assessing the outcome of a probabilistic process, we should only use evidence characterizable in a manner available before observing the outcome. This produces the right verdicts in some simple cases in which RTE leads (...) us astray, and, when applied to FTA, it shows that our evidence does confirm HM. (shrink)

A recurring theme dominates recent philosophical debates about the nature of conscious perception: naïve realism’s opponents claim that the view is directly contradicted by empirical science. I argue that, despite their current popularity, empirical arguments against naïve realism are fundamentally flawed. The non-empirical premises needed to get from empirical scientific findings to substantive philosophical conclusions are ones the naïve realist is known to reject. Even granting the contentious premises, the empirical findings do not undermine the theory, given its overall philosophical (...) commitments. Thus, contemporary empirical research fails to supply any new argumentative force against naïve realism. I conclude that, as philosophers of mind, we would be better served spending a bit less time trying to wield empirical science as a cudgel against our opponents, and a bit more time working through the implications of each other’s views – something we can accomplish perfectly well from the comfort of our armchairs. (shrink)

According to Minkoswki, Einstein's special theory of relativity reveals that ‘space by itself, and time by itself are doomed to fade away into mere shadows’. But perceptual experience represents objects as instantiating shapes like squareness — properties of ‘space by itself’. Thus, STR seems to threaten the veridicality of shape experience. In response to this worry, some have argued that we should analyze the contents of our spatial experiences on the model of traditional secondary qualities. On this picture—defended in recent (...) work by Chalmers —an experience of squareness just represents whatever property usually causes such experiences. This view salvages the veridicality of shape experience, but leaves the nature of the properties we perceive outside our ken. I argue that such a move is unwarranted: STR is compatible with the idea that shape experience acquaints us with the spatial character of our world. In defending this claim, I propose a view on which shape experience presents familiar Euclidean spatial properties veridically, while implicitly representing those properties as instantiated in a particular manner — namely, relative to our own frame of reference. (shrink)

This text offers an account of how philosophers in the 20th century have challenged the ideas of the modern philosophers of the 17th century on fundamental questions in epistemology. Featuring examples, self-study questions and further readings, the text introduces and critically defines logical analysis, foundationalism and coherentism.

Since Tversky argued that similarity judgments violate the three metric axioms, asymmetrical similarity judgments have been particularly challenging for standard, geometric models of similarity, such as multidimensional scaling. According to Tversky, asymmetrical similarity judgments are driven by differences in salience or extent of knowledge. However, the notion of salience has been difficult to operationalize, especially for perceptual stimuli for which there are no apparent differences in extent of knowledge. To investigate similarity judgments between perceptual stimuli, across three experiments, we collected (...) data where individuals would rate the similarity of a pair of temporally separated color patches. We identified several violations of symmetry in the empirical results, which the conventional multidimensional scaling model cannot readily capture. Pothos et al. proposed a quantum geometric model of similarity to account for Tversky's findings. In the present work, we extended this model to a more general framework that can be fit to similarity judgments. We fitted several variants of quantum and multidimensional scaling models to the behavioral data and concluded in favor of the quantum approach. Without further modifications of the model, the best-fit quantum model additionally predicted violations of the triangle inequality that we observed in the same data. Overall, by offering a different form of geometric representation, the quantum geometric framework of similarity provides a viable alternative to multidimensional scaling for modeling similarity judgments, while still allowing a convenient, spatial illustration of similarity. (shrink)

The paper describes tableaux based proof methods for temporal logics of knowledge allowing non-trivial interaction axioms between the modal and temporal components, namely those of synchrony and no learning and synchrony and perfect recall. The interaction axioms allow the description of how knowledge evolves over time and makes reasoning in such logics theoretically more complex. Such logics can be used to specify systems that involve the knowledge of processes or agents and which change over time, for example agent based systems, (...) knowledge games or security protocols. Soundness, completeness and termination results for the tableaux are proved. (shrink)

After 50 years of being profoundly deaf, Patricia finds her world ‘transformed’—literally and metaphorically—when she receives a cochlear implant. Her sense of self and the taken-for-granted, comfortable world she knew before surgery disappear and she is thrown into an alien, surreal existence full of hyper-noise. Entry into this new world of sounds proves a mixed blessing as Pat struggles to come to terms with her changing relationships, not only with others but also with herself. On good days, she is exhilarated (...) by all her sensory gains and her feeling of being more connected with and to the world. On bad days she is distracted and overwhelmed by the intrusive noise and she is forcibly confronted with the painful reality of her own disability. The challenge she confronts is not simply the cognitive-perceptual one of learning to discriminate between sounds. Pat must also re-orientate herself and learn to cope with her transformed self and world. She must undertake a journey to come to terms with her past, present and future being. Pat shared her story with me and together we undertook collaborative existential phenomenological research, co-creating a narrative of her journey over the year and a half following her implant. This paper presents this narrative followed by an existential analysis of Pat’s disrupted, changing lifeworld. (shrink)

In this paper, I argue that ethical normativity can be grounded in the natural normativity of organisms without being reducible to it. Michael Thompson and Philippa Foot both offer forms of neo-Aristotelian ethical naturalism; I argue that both accounts have gaps that point toward the need for a constructive virtue ethics grounded in natural normativity. Similarly, Korsgaard's constructivist ethics ignores the ongoing relevance of natural norms in human ethical life. I thus offer an account according to which the self-shaping activity (...) of human organisms supplements and transforms natural normativity, giving rise to ethical norms. Such an account grounds human ethical distinctiveness in rationality without excluding nonrational humans from the ethical community. In the final section of the paper, I argue that ethical standards can be discovered through human activities, thus allowing for gradual progression in ethical knowledge, both on individual and cultural levels. (shrink)

I argue that the denial of speakers' knowledge of language rules is based on conceptual confusion and in particular on a misanalysis of what it is to know a rule. I shall turn to the task of establishing this point after first providing the background for this issue: the difficulty of conceptualizing verbal behavior both under the hypothesis that speakers do, and under the hypothesis that speakers do not know the rules of grammar. I shall argue that this difficulty and (...) the dispute it has engendered are based on overly simple and inadequate views of rule knowledge. Our ordinary concept of knowing a rule has been radically ignored by theorists who have written on this issue. In consequence, they have operated with conceptual schemes too impoverished to allow for the knowledge that speakers do have. A more adequate analysis or account of rule knowledge will thus be the main concern of this paper with the problem of speakers’ knowledge of grammar being the motivation to attempt such an analysis. (shrink)

Imagine you are a cycling fan and are watching Lance Armstrong decimate his rivals in the time trial up L’Alpe d’Huez. However, before the event ends you are called away from the TV. You quickly put a videotape in and press record. You get time to watch the video the next morning and have successfully avoided finding out the result. Are you as excited about watching the video as you were when you sat down to watch the event on TV? (...) I suggest not. I think this example highlights an interesting topic that has escaped the atten- tion of philosophers of sport. The question I aim to answer in this article is, why are we significantly less interested in watching sport when we believe that we are not watching it at the same time as other people? Obviously, this presupposes an empirical claim, and it is to this that I first address myself. I then consider a number of ways of explaining this phenomenon, all of which I think ultimately fail. I then propose my own tentative explanation. (shrink)

Natural environments differ from artworks in two ways: (a) they are surroundings filled with objects, processes, and the observer, (b) they are natural, not intentionally created to be appreciated. I show that this serious problem for accounts of aesthetic appreciation of nature has led many thinkers in environmental aesthetics (e.g., Carlson and Rolston) to claim that appreciators should be actively engaged with a natural environment. But how? One suggestion has been that appreciators play the role of creative performers in the (...) arts. I explore this analogy, distinguishing three different kinds of performance. I argue that none is a good fit as a model of nature appreciation but that the analogy sheds considerable light on environmental art, especially the site-specific artworks of Andy Goldsworthy. (shrink)

The issues of difference, diversity, otherness, and the possibility of community have emerged as leading philosophical and socio-political questions in recent times. An increasing theoretical emphasis on issues of difference and alterity, with a corresponding convergence of topics like globalization, have brought into renewed focus not only the question of otherness, but more fundamentally, the question of how the encounter with the Other is to take place. My paper examines the treatment of issues of difference and otherness within a perspective (...) of philosophical hermeneutics. In recent writings, Gadamer has suggested that the principles of his philosophical hermeneutics can prove beneficial in reflections on contemporary social problems of diversity and cultural difference. In examining these claims, I question whether Gadamer acknowledges sufficiently the challenges and resistance of otherness. At the same time, I also question the claims of some theorists who maintain that it is never possible to bridge difference and otherness. In the end I suggest that while the resistance of difference might be underestimated, there are nevertheless promising approaches for thinking difference and diversity to be found in a hermeneutical perspective. (shrink)

Confessions both hold a great promise and pose a grave danger. When the accused speaks against his interest and assumes responsibility for criminal actions this is viewed as a compelling sign of guilt. It is not, therefore, for naught that the confession has been crowned the "queen of evidence." Yet research conducted in the last few decades has shown that a substantial number of confessions are false, ranking the out of court confession high among the factors leading to the conviction (...) of innocent people. The acceptance of DNA testing, has further substantiated this finding, igniting a renewed interest in out-of-court confessions. It is hard to assess the magnitude of social harm caused by the widespread and persistent resort to obtaining confessions, but one thing is evident from the vast literature on the matter: this evidentiary mechanism is currently overused, much beyond the optimal level. The reasons for this over-use are varied, among them the fact that confessions are readily available for law enforcement officers, and that those in charge of trying the facts tend to overwhelmingly convict based on out-of-court confessions, while underestimating the associated dangers. As a result, confessions have come to play a paramount role in the criminal justice system. Many attempts have been made to deal with confession-based wrongful convictions. Examples include the Miranda rules or the requirements for varying degrees and types of corroborating evidence. To date, all the rules and proposals share a common characteristic: They all attempt to correct the evidentiary fallacies associated with out-of-court confessions by evidentiary means, whether admissibility oriented or weight oriented. In the article we argue that none of the proposed mechanisms is likely to solve the problem. The root of the problem lies in the fact that the entire criminal justice system is currently organized around confessions. Law enforcement officers focus on obtaining confessions and the prosecution uses it as its evidentiary centerpiece. Further restricting admissibility or requiring a higher degree of corroboration will not change this trend. Moreover, the confessional lure is too strong to resist. Like the Sirens' Song, the confession casts a spell on all those subjected to it and, no matter how strong a corroboration we require, we will eventually fall back on the confession. We propose an entirely different solution to the tendency to over-use confessions, one that utilizes penal means to change the incentive structure within the criminal justice system. We propose to incorporate into the sentencing guidelines a mandatory reduction of the criminal sanction whenever an out-of-court confession is introduced into evidence by the prosecution. In other words, our proposal is to elevate the cost of using out-of court confessions, as compared to other types of evidence. The article will demonstrate how placing such a "sentencing price tag" on the use of out-of-court confessions will correct the current bias in favor of using this evidence and induce law enforcement officials to seek extrinsic evidence, thus turning confessions into a residual evidentiary devise. The article will also show that the proposed regime will improve the court's ability to distinguish between true and false confessions. After discussing the proposed model's normative appeal, the article will proceed to deal with possible criticisms which can be leveled against it, whether retributive, utilitarian or expressive. (shrink)

This chapter explores awareness and compassion as essential elements in spiritual cultivation. Of the education of awareness, it describes the ideas of Aldous Huxley and J. Krishnamurthi as well as the Buddha’s teachings on mindfulness. The practice of awareness would reveal a holistic experience and multiple dimensions of reality. This chapter briefly describes the author’s view of “the five dimensions of reality” that include dimensions from the surface to the deepest, infinite reality. Drawing on Eastern perspectives, it explains that “pure (...) awareness” is identical with infinite reality and that “great compassion” emerges as a manifestation of pure awareness. In addition, as for cultivating compassion, this chapter explores such concepts as the Four Immeasurable Minds, bodhichitta, bodhisattva, and also the mind training called lojong in Tibetan Buddhism. Finally, it suggests a vision of “the education of enlightenment,” in which both awareness and compassion are of central importance. (shrink)