Believing in free will may arise from a biological need for control. People induced to disbelieve in free will show impulsive and antisocial tendencies, suggesting a reduction of the willingness to exert self-control. We investigated whether undermining free will affects two aspects of self-control: intentional inhibition and perceived self-control. We exposed participants either to anti-free will or to neutral messages. The two groups then performed a task that required self-control to inhibit a prepotent response. No-free will participants showed less intentional (...) inhibitions than controls, suggesting a reduction of self-control. We assessed perceived self-control by asking participants whether the response resulted from a deliberate intention or from an impulsive reaction. Perceived self-control was lower in the no-free will group than in control group. Our findings show that undermining free will can degrade self-control and provide insights into how disbelieving in free will leads to antisocial tendencies. (shrink)

Simple finite axiomatizations are given for versions of the modal logics K and K4 with non-contingency (or contingency) as the sole modal primitive. This answers two questions of I. L. Humberstone.

Montague, Prior, von Wright and others drew attention to resemblances between modal operators and quantifiers. In this paper we show that classical quantifiers can, in fact, be regarded as S5-like operators in a purely propositional modal logic. This logic is axiomatized and some interesting fragments of it are investigated.

Between 300,000 and 250,000 years ago early humans in Africa and Eurasia began to use durable material substances and objects as media for signaling. Initially material signals were confined to ochre and other pigments, but over time objects such as beads were also added as technologies for sending messages. Changes in the types of materials used, their durability and costs, and the contexts of their disposal indicate a series of transitions in how early humans employed signaling media. Signaling theory from (...) biology suggests that shifts in technologies over the course of the Pleistocene reflect problems in coordinating action and resolving conflicts within increasingly large and internally differentiated societies. (shrink)

The subjective feeling of free choice is an important feature of human experience. Experimental tasks have typically studied free choice by contrasting free and instructed selection of response alternatives. These tasks have been criticised, and it remains unclear how they relate to the subjective feeling of freely choosing. We replicated previous findings of the fMRI correlates of free choice, defined objectively. We introduced a novel task in which participants could experience and report a graded sense of free choice. BOLD responses (...) for conditions subjectively experienced as free identified a postcentral area distinct from the areas typically considered to be involved in free action. Thus, the brain correlates of subjective feeling of free action were not directly related to any established brain correlates of objectively-defined free action. Our results call into question traditional assumptions about the relation between subjective experience of choosing and activity in the brain’s so-called voluntary motor areas. (shrink)

The problem of free will lies at the heart of modern scientific studies of consciousness. Some authors propose that actions are unconsciously initiated and awareness of intention is referred retrospectively to the action after it has been performed [e.g. Aarts, H., Custers, R., & Wegner, D. M. . On the inference of personal authorship: Enhancing experienced agency by priming effect information. Consciousness & Cognition, 14, 439–458]. This contrasts with the common impression that our intentions cause those actions. By combining a (...) stop signal paradigm and an intentional action paradigm we show that participants sometimes indicate to have intentionally initiated an action while reaction time data strongly suggest that they in fact failed to stop the action. In a second experiment we demonstrate that the number of trials in which participants misattributed their awareness of intention varied with the intentional involvement during action planning. Our data support the retrospective account of intentional action. Furthermore, we introduce an experimental approach that objectifies introspective judgments of awareness of intention. (shrink)

Lloyd Humberstone’s recently published Philosophical Applications of Modal Logic presents a number of new ideas in modal logic as well explication and critique of recent work of many others. We extend some of these ideas and answer some questions that are left open in the book.

Beads and other ‘body ornaments’ are very widespread components of the archaeological record of early modern humans (Homo sapiens). They appear first in the Middle Stone Age in Africa, and somewhat later in the Early Upper Paleolithic of Eurasia. The manufacture and use of ornaments is widely considered to be evidence for significant developments in human cognition. In our view, the appearance of these objects represents the interaction of evolved cognitive capacities with changing social and demographic conditions. Body ornamentation is (...) a medium or technology for communication, particularly of socially-relevant information. The widespread adoption of beads and other discrete objects as media for communication implies changes in the complexity and stability of social messages, as well as the scale of social networks. The relatively sudden appearance of beads in the Paleolithic archaeological record coincides with genetic and archaeological evidence for expansion of human populations. We argue that these changes reflect expanding scales of social interaction and more complex social landscapes resulting from unprecedentedly large and internally differentiated human populations. (shrink)

Applications of game theory to moral philosophy are impededby foundational issues and troublesome examples. In the first part of this paper,questions are raised about the appropriate game-theoretical frameworks for applications to moralphilosophy and about the proper interpretations of the theoretical devices employed inthese frameworks. In the second part, five examples that should be of particular interest to thoseinterested in the connections between ethics and game theory are delineated and discussed. Thefirst example comprises games in which there is an outcome unanimously (...) preferred to the``solution'' of the game, appropriately defined. The second comprises games whose solution callsfor different players to employ different strategies. The third comprises games whosesolution calls for players to adopt mixed strategies. The fourth comprises games whose solutionrequires players to cycle among a variety of strategies. The fifth comprises games whose solutionrequires players to discriminate in morally inappropriate ways. (shrink)

The system obtained by adding full propositional quantification to S5 is known to be decidable, while that obtained by doing so for T is known to be recursively intertranslatable with full second-order logic. Recently it was shown that the system with two S5 operators and full propositional quantification is also recursively intertranslatable with second-order logic. This note establishes that the map assigning [1][2]p to \squarep provides a validity and satisfaction preserving translation between the T system and the double S5 system, (...) thus providing an easier proof of the recent result. (shrink)

The prisoner 's dilemma game has acquired large literatures in several disciplines. It is surprising, therefore, that a good definition of the game is hard to find. Typically an author relates a story about captured criminals or military rivals, provides a particular payoff matrix and asserts that the PD is characterized, or illustrated, by that matrix. In the few cases in which characterizing conditions are given, the conditions, and the motivations for them, do not always agree with each other or (...) with the paradigm examples elsewhere. In this paper we describe several varieties of PD's. In particular, we suggest there are two distinctions among PD's with philosophical significance, the pure/impure and the utilitarian/nonutilitarian distinctions. In the first section, we explain and characterize the two distinctions. In the second, we discuss an issue of moral philosophy that illustrates the significance of the former. (shrink)

A notable early result of David Makinson establishes that every monotone modal logic can be extended to LI, LV, or LF, and every antitone logic can be extended to LN, LV, or LF, where LI, LN, LV, and LF are logics axiomatized, respectively, by the schemas □α↔α, □α↔¬α, □α↔⊤, and □α↔⊥. We investigate logics that are both monotone and antitone (hereafter amphitone). There are exactly three: LV, LF, and the minimum amphitone logic AM axiomatized by the schema □α→□β. These logics, (...) along with LI, LN, and a wider class of “extensional” logics, bear close affinities to classical propositional logic. Characterizing those affinities reveals differences among several accounts of equivalence between logics. Some results about amphitone logics do not carry over when logics are construed as consequence or generalized (“multiple-conclusion”) consequence relations on languages that may lack some or all of the nonmodal connectives. We close by discussing these divergences and conditions under which our results do carry over. (shrink)

Post-translational histone modifications and their biological effects have been described as a ‘histone code’. Independently, Barbieri used the term ‘organic code’ to describe biological codes in addition to the genetic code. He also provided the defining criteria for an organic code, but to date the histone code has not been tested against these criteria. This paper therefore investigates whether the histone code is a bona fide organic code. After introducing the use of the term ‘code’ in biology, the criteria a (...) putative organic code such as the histone code must conform to in order to be recognised as an organic code are described. Our current knowledge of histones and their major post-translational modifications, and the specific protein binding domains that recognise and translate these into specific biological effects, is then reviewed in detail. The histone modification system is then placed in the context of an organic code and it is concluded that it fulfils all the requirements of an organic code. The marks produced on histones by processes such as acetylation and methylation act as organic signs that are translated into unique biological effects, their biological meanings. These translations are accomplished by effector proteins that consist of a binding domain that recognises a specific histone mark and a regulatory domain that mediates the biological effect. Crucially, these domains can be experimentally interchanged between different effector proteins, thus altering the rules that specify the relationships between sign and meaning. The effector proteins therefore fulfil the role of adaptor molecules. (shrink)

Ideomotor theory of human action control proposes that activation of a motor representation can occur either through internally-intended or externally-perceived actions. Critically, sometimes these alternatives of eliciting a motor response may be conflicting, for example, when intending one action and perceiving another, necessitating the recruitment of enhanced action-control to avoid motor mimicry. Based on previous neuroimaging evidence, suggesting that reduced mimicry is associated with self-related processing, we aimed to experimentally enhance these action-control mechanisms during motor contagion by inducing self-focus. In (...) two within-subjects experiments, participants had to enforce their action intention against an external motor contagion tendency under heightened and normal self-focus. During high self-focus participants showed reduced motor mimicry, induced either by mirror self-observation or self-referential judgments. This indicates that a self-focus provoking situation can enhance online action-control mechanisms, needed to resist unintentional motor contagion tendencies and thereby enables a modulation of automatic mirroring responses. (shrink)

Evolutionary Transitions in Individuality have been responsible for the major transitions in levels of selection and individuality in natural history, such as the origins of prokaryotic and eukaryotic cells, multicellular organisms, and eusocial insects. The integrated hierarchical organization of life thereby emerged as groups of individuals repeatedly evolved into new and more complex kinds of individuals. The Social Protocell Hypothesis proposes that the integrated hierarchical organization of human culture can also be understood as the outcome of an ETI—one that produced (...) a “cultural organism” from a substrate of socially learned traditions that were contained in growing and dividing social communities. The SPH predicts that a threshold degree of evolutionary individuality would have been achieved by 2.0–2.5 Mya, followed by an increasing degree of evolutionary individuality as the ETI unfolded. We here assess the SPH by applying a battery of criteria—developed to assess evolutionary individuality in biological units—to cultural units across the evolutionary history of Homo. We find an increasing agreement with these criteria, which buttresses the claim that an ETI occurred in the cultural realm. (shrink)

The semantics of tense has received a great deal of attention in the contemporary linguistics, philosophy and logic literatures. This is probably due partly to a renewed appreciation for the fact that issues involving tense touch on certain issues of philosophical importance (viz., determinism, causality, and the nature of events, of time and of change). It may also be due partly to neglect. Tense was noticeably omitted from the theories of meaning advanced in previous generations. In the writings of both (...) Russell and Frege there is the suggestion that tense would be absent altogether from an ideal or scientifically adequate language. (Tense was not the only blemish of natural language to be removed, of course, but tense is a more serious omission than, say, pronouns because it is present in every sentence of the language.) Finally, in recent years there has been a greater recognition of the important role that all of the so-called “indexical” expressions must play in an explanation of mental states and human behavior. Tense is no exception. Knowing that our friend died is cause for mourning, knowing that he dies is just another confirmation of a familiar syllogism. (shrink)

The aim of this study is to determine to what extent the tense markers of tense logic represent what is represented by the tense forms of natural language. To achieve this, it will be necessary to report the findings of linguistics on what the tense forms of natural languages do represent. The justification for this study lies in a fundamental difference between natural and logical languages. Where natural languages develop to meet the needs of their speakers, logical language is used (...) for testing the validity of argument of a certain kind. Tense logic has been used to examine philosophical issues, and in linguistics to examine how tenses describe many different possible structures of time. (shrink)

The beneficial effects of physical exercise on physical health and cognitive functioning have been repeatedly shown. However, evidence of its effect on psychosocial functioning in healthy adults is still scarce or inconclusive. One limitation of many studies examining this link is their reliance on correlational approaches or specific subpopulations, such as clinical populations. The present study investigated the effects of a physical exercise intervention on key factors of psychosocial functioning, specifically well-being, stress, loneliness, and future time perspective. We used data (...) from healthy, previously sedentary older adults who participated in a 6-month at-home intervention, either engaging in aerobic exercise or as part of a control group who participated in foreign language-learning or reading of selected native-language literature. Before and after the intervention, comprehensive cardiovascular pulmonary testing and a psychosocial questionnaire were administered. The exercise group showed significantly increased fitness compared to the control group. Contrary to expectations, however, we did not find evidence for a beneficial effect of this fitness improvement on any of the four domains of psychosocial functioning we assessed. This may be due to pronounced stability of such psychological traits in older age, especially in older adults who show high levels of well-being initially. Alternatively, it may be that the well-documented beneficial effects of physical exercise on brain structure and function, as well as cognition differ markedly from beneficial effects on psychosocial functioning. While aerobic exercise may be the driving factor for the former, positive effects on the latter may only be invoked by other aspects of exercise, for example, experiences of mastery or a feeling of community. (shrink)

This article examines emergency restrictions imposed by state-level public officials on firearms during the COVID-19 pandemic. It surveys the litigation challenging each of the relatively few restrictions that were imposed, considers when and whether courts should apply the deferential Jacobson standard, the Heller Second Amendment analysis, or both, and explores the possibility that the unsettled nature of Second Amendment jurisprudence makes it likely that challenges to emergency firearms restrictions could result in dramatic developments in what the Second Amendment protects.

This chapter contains sections titled: Introduction Don't Laugh at “Slow” Sailing: Average Versus Instantaneous Motion Motion Relative to What? – Galilean Relativity But There are No Fixed Reference Frames – Special Relativity General Relativity – Can it Really Matter?

A sentence containing a number of definite descriptions, each lying within the scope of its predecessor, is naturally read as asserting the uniqueness of a sequence of objects satisfying the descriptions. The project of providing a general uniform procedure for eliminating embedded definite descriptions that gets this and other logical forms right is impeded by several puzzles.

Le dilemme du prisonnier occupe une place centrale dans la théorie morale de Gauthier, mais cette place est en évolution. Dans «Morality and Advantage», ce dilemme fournit un modèle montrant comment la moralité peut avoir des propriétés apparemment contradictoires. Dans Morals by Agreement, il pose un problème particulier pour l’opinion selon laquelle un comportement moral est individuellement rationnel. Suite à ces publications, certains experts en théorie des jeux ont contesté l’idée voulant que le dilemme du prisonnier soit un cadre approprié (...) pour réfléchir sur la théorie morale. La première partie de cet article examine les rôles du dilemme du prisonnier dans l’œuvre de Gauthier. La deuxième partie présente un projet, incluant des composantes descriptives et normatives, qui développe les idées de «Morality and Advantage» tout en le préservant de la critique des théoriciens des jeux. (shrink)

This qualitative study identifies police interactions with gun violence co-victims as a crucial, overlooked component of police unresponsiveness, particularly in minority communities where perceptions of police illegitimacy and legal estrangement are relatively high. Gun violence co-victims in three cities participated in online surveys, in which they described pervasive disregard by police in the aftermath of their loved ones' shooting victimization. We build on the checklist model that has improved public safety outcomes in other complex, high-intensity professional contexts to propose a (...) checklist for police detectives to follow in the aftermath of gun violence. To build the checklist, we also reviewed the general orders of five police departments to better understand what guidance, if any, is currently given to police personnel regarding how they should interact with gun violence victims. (shrink)