This article presents a fundamental advance in the theory of mental models as an explanation of reasoning about facts, possibilities, and probabilities. It postulates that the meanings of compound assertions, such as conditionals (if) and disjunctions (or), unlike those in logic, refer to conjunctions of epistemic possibilities that hold in default of information to the contrary. Various factors such as general knowledge can modulate these interpretations. New information can always override sentential inferences; that is, reasoning in daily life is defeasible (...) (or nonmonotonic). The theory is a dual process one: It distinguishes between intuitive inferences (based on system 1) and deliberative inferences (based on system 2). The article describes a computer implementation of the theory, including its two systems of reasoning, and it shows how the program simulates crucial predictions that evidence corroborates. It concludes with a discussion of how the theory contrasts with those based on logic or on probabilities. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Comments on “Moral Complicity in Induced Pluripotent Stem Cell Research”W. Malcolm Byrnes, Ph.D. and Edward J. FurtonIn his article titled “Moral Complicity in Induced Pluripotent Stem Cell Research,” Mark T. Brown (2009) unfortunately mischaracterizes my ethical analysis of the use of induced pluripotent stem (iPS) cells for replacement therapies, or treatments (Byrnes 2008). In my paper, which Brown cites, I argue that, just as it is ethically (...) acceptable for parents to allow their children and themselves to be immunized using vaccines produced by cell lines derived from human fetuses aborted in the past, it is also acceptable for persons in the future to benefit from treatments that use iPS cells validated using human embryonic stem (ES) cell lines [End Page 202] derived in the past. The assumption I make is that iPS cells would have to be shown to be functionally equivalent to human ES cells—i.e., validated—before they could be used for cell replacement treatments. (If it turns out that this assumption is incorrect, and primate or even mouse ES cells can be used for the validation, then all residual ethical problems will disappear and there will be no ethical problems whatsoever associated with iPS cells.) I wrote:... [I]n both cases, the origin of the treatment is in a one-time event: either the one-time use of aborted fetuses to obtain cell lines (e.g., MRC-5 and WI- 38) to grow weakened virus strains for vaccine production, or the one-time destruction of human embryos to validate iPS cells, which then effectively replace embryonic stem cells. In the latter case, if no additional embryonic stem cell lines are derived, then derivation of the existing lines could be considered a “one-time” event in the past, albeit an event that extended over a several-year period(Byrnes 2008, p. 287, emphasis added).Note the phrase “if no additional embryonic stem cell lines are derived.” The derivation of ES cell lines inherently involves destruction of embryos; indeed, that is why many people, including me, are opposed to human ES cell research. In my article, I am arguing that, if no additional ES cell lines are derived, then no additional human embryos will be destroyed, and the destruction of human embryos will lie in the past. In this case, embryo destruction could be considered a past event, just as the abortion of a human fetus from which vaccine-producing cell lines were derived is a past, albeit tragic, event.In the process of building his argument that proponents of iPS cell research are morally complicit in embryo destruction, Brown (2009, p. 15) casts me as being in favor of the “derivation of new embryonic stem [cell lines].” This is the exact opposite of my position. In fact, I am opposed to further destruction of human embryos. I believe that the hundreds of ES cell lines already in existence are more than sufficient to validate iPS cells and so no additional lines need to be derived. This means that no additional human embryos will need to be destroyed.Apparently based on the misperception that I support future destruction of human embryos, Brown concludes that “Byrnes’s endorsement of ongoing iPSC validation studies would seem to implicate him and those who follow his lead in formal and material complicity in what they perceive as moral evil” (p. 16). He writes that “explicit formal complicity would attach because he [Byrnes] knowingly and intentionally recommends that embryos be killed in order to facilitate a transition to a future in which no more embryos need be destroyed” (p. 16). Additionally, my “followers” and I would be guilty of “proximate material complicity” as well as “remote material complicity” (p. 16). Unfortunately, this broad condemnation is based on a misconception of my actual position.An additional problem involves Brown’s use of a quotation he attributes to me: [End Page 203]Once embryonic stem cells are used to successfully validate iPS cells, they will no longer be needed and their association with iPS cells will lie in the past. Is there not an element of sadness and resignation in accepting something (iPS cells) associated with an unjust act (destruction of an... (shrink)

We examined how people think about how things could have turned out differently after they made a decision to cooperate or not in three social interactions: the Prisoner’s dilemma (Experiment 1), the Stag Hunt dilemma (Experiment 2), and the Chicken game (Experiment 3). We found that participants who took part in the game imagined the outcome would have been different if a different decision had been made by the other player, not themselves; they did so whether the outcome was good (...) or bad for them, their own choice had been to cooperate or not, and the other player’s choice had been to cooperate or not. Participants who only read about a fictional protagonist’s game imagined changes outside the protagonist’s control (such as the other player’s decision) after a good outcome but within the protagonist’s control (such as the protagonist’s decision) after a bad outcome. The implications for theories of counterfactual thinking and moral decision-making are discussed. (shrink)

People judge that an individual who attempts to harm someone but fails should be blamed and punished more when they imagine how things could have turned out worse, compared to when they imagine how things could have turned out the same, or when they think only about what happened. This moral counterfactual amplification effect occurs when people believe the protagonist had no reason for the attempt to harm, and not when the protagonist had a reason, as Experiment 1 shows. It (...) occurs for intentional failed attempts to harm and also for accidental near-misses, as Experiment 2 shows, but not for failed attempts in which the harm occurs anyway by another cause, for both general judgments about the event and specific judgments about the individual's actions, as Experiments 3 and 4 show. The implications for understanding the role of counterfactual thoughts in moral judgement are discussed. (shrink)

We report the results of two experiments that show that participants rely on both emotion and reason in moral judgments. Experiment 1 showed that when participants were primed to communicate feelings, they provided emotive justifications not only for personal dilemmas, e.g., pushing a man from a bridge that will result in his death but save the lives of five others, but also for impersonal dilemmas, e.g., hitting a switch on a runaway train that will result in the death of one (...) man but save the lives of five others; when they were primed to communicate thoughts, they provided non-emotive justifications for both personal and impersonal dilemmas. Experiment 2 showed that participants read about a protagonist's emotions more quickly when the protagonist was faced with a personal dilemma than an impersonal one, but they read about the protagonist's decision to act or not act equally quickly for personal and impersonal dilemmas. (shrink)

Participants acting as mock jurors made inferences about whether a person was a suspect in a murder based on an expert's testimony about the presence of objects at the crime scene and the disclosure that the testimony was true or false. Experiment 1 showed that participants made more correct inferences, and made inferences more quickly, when the truth or falsity of the expert's testimony was disclosed immediately after the testimony rather than when the disclosure was delayed. Experiment 2 showed no (...) advantage for prior disclosure over immediate disclosure. Experiment 3 showed that the pattern of inferences when there was no disclosure mirrored the pattern when it was disclosed that the expert's testimony was true rather than false. Participants made more correct inferences from true conjunctions than disjunctions, and from false disjunctions than conjunctions. We discuss the implications for theories of the mental representations and cognitive processes that underlie human reasoning. (shrink)

This paper replies to Politzer’s (2007) criticisms of the mental model theory of conditionals. It argues that the theory provides a correct account of negation of conditionals, that it does not provide a truth-functional account of their meaning, though it predicts that certain interpretations of conditionals yield acceptable versions of the ‘paradoxes’ of material implication, and that it postulates three main strategies for estimating the probabilities of conditionals.

O’BYRNE P and WATTS J. Nursing Inquiry 2012 [Epub ahead of print] Include, differentiate and manage: gay male youth, stigma and healthcare utilizationIn Canada, there has been a recent increase in HIV incidence among young men who have sex with men. However, gay male youth (GMY) may forego HIV testing due to fear of stigmatization. Therefore, the aim of this research was to explore the perceptions of stigma in health care within this population. The research was conducted through a series (...) of semi‐structured interviews with eight GMY aged 20–29, who frequented a gay‐friendly clinic in downtown Ottawa, Canada. In a sub‐analysis of the interviews utilizing the work of Hardt and Negri’s three‐part sequence – inclusion, differentiation and management – we found that homosexuality‐related stigmatization affects the interaction between GMY and health professionals. Interview participants perceived HIV‐related risk counselling as a manifestation of stigma. These findings reveal that the experience of stigma and stigmatization is not necessarily based on health professionals’ intentions, but rather, on patients’ perceptions of the interactions they have with health professionals. Specific modifications to the delivery of health care may help to overcome stigmatization. (shrink)

John J. Cleary was an internationally recognised authority in ancient Greek philosophy. This volume of penetrating studies of Plato, Aristotle, and Proclus, philosophy of mathematics, and ancient theories of education, display Cleary’s range of expertise and originality of approach.

Bernard Lonergan’s vocation as a Jesuit was central to his entire life’s work, although this is not well known. This essay shows the indebtedness of Lonergan’s method of self-appropriation owes a great deal to Ignatian spiritual practices. In particular, it shows how Ignatian prayer and Lonergan’s account of the structures of consciousness mutually enhance one another. In particular, it concentrates on how prayer is a transforming encounter between Christ and the one praying.

We have justified beliefs about the external world, and some of these are formed directly on the basis of perception. I may justifiably believe that a certain dog is in certain manger, and I may have this belief because I can see that the dog is in the manger. So far, so good.

Abstract Empiricist philosophers of mind have long maintained that the possession conditions of many concepts include recognitional abilities. One of Jerry Fodor's recent attacks on empiricist semantics proceeds by attempting to demonstrate that there are no such, ?recognitional? concepts. His argument is built on the claim that if there were such concepts, they would not compose: i.e., they would exhibit properties which are not in general ?inherited? by complex concepts of which they are components. Debate between Fodor and his critics (...) on this issue has focused on his construal of compositionality, the critics in effect advocating a weaker conception than that assumed by Fodor. I argue that the critics' contention is under-motivated, and in the current context ad hoc. But there is something else wrong with Fodor's argument. He misidentifies the notion of recognitionality in which the empiricist should trade. A proper understanding of recognitionality allows us to disarm Fodor's argument without resolving the question about compositionality that divides Fodor and his critics. I end with two very general remarks. First a contention about the motivation for empiricist semantics, and second, a suggestion that my proposal about recognitionality may be extended to disarm a more familiar and influential type of concern about their viability. (shrink)

Comment from Author (12-17-13): Please note that the correct term for the theological attempt to resolve the problem of how evil can exist in a world ruled by a loving and all-powerful God is "theodicy," not "theodicity" as indicated in the second paragraph on the first page of the article. I apologize for the error.

This review of Ellul's The Technological System plus a book of essays that attempt to interpret Ellul notes how negatively his earlier work was received by English-speaking readers and how poorly he wins them over in this book. He argues that there is "a technological system" that is embedded in society and cannot be controlled however much government may try. Government may be deemed the villain of this book and computers the heroes. The Third World, not yet subject to the (...) system, will in time become so. According to the essays in the other book, the best way to view technology is from the perspective of Christian theology, and Ellul agrees. (shrink)

The philosophical literature on sport and games has had little to say about boredom beyond presuming that sports and games can be important ways of overcoming or preventing it. But boredom is an interesting and often misunderstood phenomenon with overlooked implications in this context. Boredom has significant human value and motivates play in ways that contribute to well-being and culture, often through encouraging engaged agency and exploration of novelty. Understanding boredom can also help to clarify problems and tendencies in sports (...) and games that qualify them as havens from boredom. (shrink)

Byrne's approach to the semifactual conditional captures the reasoning data. However, we argue that it does not account for the processes or principles by which people arrive at representations of even-if conditionals, upon which their reasoning is said to be based. Drawing upon recent work on the suppositional conditional we present such an account.

The phenomenon of ambivalence is an important one for any philosophy of action. Despite this importance, there is a lack of a fully satisfactory analysis of the phenomenon. Although many contemporary philosophers recognize the phenomenon, and address topics related to it, only Harry Frankfurt has given the phenomenon full treatment in the context of action theory - providing an analysis of how it relates to the structure and freedom of the will. In this paper, I develop objections to Frankfurt's account, (...) all revolving around the charge that his account contains a serious ambiguity between willing and identifying. With such objections in place, I then develop an analysis that avoids the difficulties and ambiguities that Frankfurt's analysis is prey to. I briefly distinguish ambivalence from other types of internal conflict. This paper aims to offer conceptual clarification on the phenomenon of ambivalence, which will then allow for discussions about the normative merits and demerits of ambivalence, the effects of ambivalence on autonomous action, and methods of resolution of ambivalence. (shrink)

This paper focuses on the self-knowledge of emotions. I first argue that several of the leading theories of self-knowledge, including thetransparency method(see, e.g., Byrne 2018) andneo-expressivism(see, e.g., Bar-On 2004), have difficulties explaining how we authoritatively know our own emotions (even though they may plausibly account for sensation, belief, intention, and desire). I next consider Barrett’s (2017a) empirically informedtheory of constructed emotion. While I agree with her that we ‘give meaning to [our] present sensations’ (2017a, p.26), I disagree with her that (...) we construct our emotions, as this has some unwelcome implications. I then draw upon recent data from the science of emotions literature to advance a view I call partial first-person authority. According to this view, first-person authority with respect to our emotions is only partial: we can introspect and authoritatively know our own sensations, and beliefs, in ways others cannot; but we still need to interpret those sensations and beliefs, to know our emotions. Finally, I consider self-interpretational accounts of self-knowledge by Carruthers (2011) and Cassam (2014). I argue that while these accounts are implausible when applied to beliefs, desires, and intentions, they are more plausible when applied to our emotions. (shrink)

The idea of the philosopher-statesman finds its first literary expression in Plato's Republic, where Socrates, facing the ‘third wave’ of criticism of his ideal State, how it can be realized in practice, declares2 that it will be sufficient ‘to indicate the least change that would affect a transformation into this type of government. There is one change’, he claims, ‘not a small change certainly, nor an easy one, but possible.’ ‘Unless either philosophers become kings in their countries, or those who (...) are now called kings and rulers come to be sufficiendy inspired with a genuine desire for wisdom; unless, that is to say, political power and philosophy meet together, … there can be no rest from troubles for states.’. (shrink)

In this paper I critically examine Peter Byrne's arguments against theological realism.

We investigate how the perceived uncertainty of a conditional affects a person's choice of conclusion. We use a novel procedure to introduce uncertainty by manipulating the conditional probability of the consequent given the antecedent. In Experiment 1, we show first that subjects reduce their choice of valid conclusions when a conditional is followed by an additional premise that makes the major premise uncertain. In this we replicate Byrne. These subjects choose, instead, a qualified conclusion expressing uncertainty. If subjects are given (...) a third statement that qualifies the likelihood of the additional premise, then the uncertainty of the conclusions they choose is systematically related to the suggested uncertainty. Experiment 2 confirms these observations in problems that omit the additional premise and qualify the first premise directly. Experiment 3 shows that the qualifying statement also affects the perceived probability of the consequent given the antecedent of the conditional. Experiment 4 investigates the effect of suggested uncertainty on the fallacies and shows that increases in uncertainty reduce the number of certain conclusions that are chosen while affirming the consequent but have no effect on denying the antecedent. We discuss our results in terms of rule theories and mental models and conclude that the latter give the most natural account of our results. (shrink)

The idea of the philosopher-statesman finds its first literary expression in Plato's Republic, where Socrates, facing the ‘third wave’ of criticism of his ideal State, how it can be realized in practice, declares2 that it will be sufficient ‘to indicate the least change that would affect a transformation into this type of government. There is one change’, he claims, ‘not a small change certainly, nor an easy one, but possible.’ ‘Unless either philosophers become kings in their countries, or those who (...) are now called kings and rulers come to be sufficiendy inspired with a genuine desire for wisdom; unless, that is to say, political power and philosophy meet together, … there can be no rest from troubles for states.’. (shrink)

Byrne & Russon provide illustrative examples of imitative abilities in nonhuman primates. The convincing aspects of the examples are not, however, their hierarchical or structured nature: Such organization may be inevitable and hence, does not require explanation via imitation. Rather, examples of imitation are derived from reproduction of behaviors and sequences that, from the organism's perspective, are arbitrary.

The strange story of the von Neumann impossibility proof is recalled, and the even stranger story of later impossibility proofs, and how the impossible was done by de Broglie and Bohm. Morals are drawn.

Introduction to one of the most important, controversial, and suggestive works of moral philosophy ever written.

Supertasks recently discussed in the literature purport to display a failure ofenergy conservation and determinism in Newtonian mechanics. We debatewhether these supertasks are admissible as Newtonian systems, with Earmanand Norton defending the affirmative and Alper and Bridger the negative.

Byrne implies that working memory development underpins children's ability to represent counterfactuals as possibilities at 3 to 4 years of age. Recent findings suggest that (1) developments in the ability to consider alternatives to reality in children of this age are underpinned by improvements in inhibitory control, not working memory, and (2) children do not develop an understanding of counterfactuals as possibilities until mid-childhood.

The current study collected orally-delivered autobiographical narratives from a sample of 44 undergraduate students. Participants were asked to produce both deceptive and non-deceptive versions of their narrative to two specific autobiographical question prompts while standing in front of a video camera. Narratives were then analyzed with Coh-Metrix software on 33 indices of linguistic cohesion. Following a Bonferroni correction for the large number of linguistic variables , results indicated that the deceptive narratives contained more explicit action verbs, less linguistic complexity, and (...) less referential coherence . The results support a theory that, in deceptive narratives, there is greater narrative distance between the self that narrates and the self that is narrated about. This suggests that narrative selves are constituted not as autonomous selves, but are subject to processes that are likely operating on a subconscious level. (shrink)