Sleep is soothing, silent, and serene, until it is not. Sleep is often troubled, disturbed, or even “disordered” as the medical literature describes it. This paper begins from an extreme form of such disturbance—terrified sleep. Night terrors (pavor nocturnus), in which sleep is violently interrupted, offer important insights into sleep and the methods by which it is studied. The sanitising nature of the medical classification of night terrors as part of a continuum with sleepwalking and yet strikingly distinct from nightmares, (...) leads us into the arms of a more traditional, first-person, phenomenological investigation of night terrors. Without denying the power of both approaches, this paper offers a deconstructive alternative reading of this troubling of sleep through Jean-Luc Nancy’s rethinking of the body, its suffering and materiality. Nancy, and Derrida, help us tarry with the body terrified and trembling in night terrors. First the paper explores the medical incisions within sleep that carve out night terrors, as a delimited phenomenon. This is followed by a consideration of what phenomenology can, and crucially cannot, add to our understanding of night terrors. Next a deconstructive critique of the phenomenological concepts of Leib and Körper is utilised to return to the material body gripped by the night terror. This in turn leads to an alternative account of this parasomnia through a post-Nancean phenomenology of terror as distinct from fear and Angst. The paper closes by drawing out several conclusions about the body, sleep, and phenomenology’s limits when approaching the somnolent. (shrink)

The anthropologist Claude Levi-Strauss was one of the greatest intellectuals of the twentieth century. His work has had a profound impact not only within anthropology but also linguistics, sociology and philosophy. In this short book he examines the nature and role of myth in human history, distilling a lifetime of writing into a few sharp insights. It is a crystalline overview of many of the basic ideas underlying his work, including the theory of structuralism and the difference between 'primitive' and (...) 'scientific' thought and shows why Levi-Strauss remains a hugely important intellectual figure. With a new foreword by Patrick Wilcken. (shrink)

In the introduction to Probabilistic Metaphysics, Patrick Suppes declares his intention to refute each of five central tenets of “neotraditional metaphysics”. These tenets run as follows:The future is determined by the past.Every event has a sufficient determinant cause.Knowledge must be grounded in certainty.Scientific knowledge can in principle be made complete.Scientific knowledge and method can in principle be unified.

In lieu of an abstract, here is a brief excerpt of the content:The Gray ZonePatrick HenryThe Question of Jewish complicity during the Holocaust remains nuanced and troubling even if recent research has altered some earlier entrenched assumptions regarding its nature and extent. Hannah Arendt, for example, who saw the complicity of the Jewish Councils in the ghettos as part of the general "moral collapse" of the time, remarked famously that:Wherever Jews lived, there were recognized Jewish leaders, and this leadership, almost (...) without exception, cooperated in one way or another for one reason or another, with the Nazis. The whole truth was that if the Jewish people had really been unorganized and leaderless, there would have been chaos and plenty of misery but the total number of victims would hardly have been between four and a half and six million people.1Thirty-eight years later, however, in Rethinking the Holocaust, Yehuda Bauer points out that not only were the Jewish Councils "in many of the Polish and Lithuanian ghettos... not asked for and did not deliver lists of Jews," but also "many of the Soviet territories had no Judenräte and the destruction was even more efficient there than in Poland." Finally, as Bauer also reports, in many smaller places, the Judenräte refused to cooperate in any way whatsoever.2The Judenräte or Jewish Councils were Nazi-established executive committees throughout Occupied Europe at once fully responsible for the implementation of Nazi directives and in charge of the administration, labor, finances, cultural and health services, food supply, and policing of the Jewish community or ghetto. These councils were set up to force the Jews to do the work of the Nazis and to keep the Jews at odds with one another as the implementation of Nazi directives progressively and [End Page 150] inevitably undercut the councils' ability to provide for the basic physical needs of the Jewish community. How these councils acted under the pressure of deportation orders differed from ghetto to ghetto. For his part, although he speaks mainly about complicity in the camps, Primo Levi identifies a "gray zone" in the ghettos and the camps where some of the "privileged oppressed" became oppressors themselves, thereby blurring any simple all-encompassing distinction between victim and executioner.3IIn her "Postscript" to Eichmann in Jerusalem, Arendt notes that in Israel in 1963 "the Jewish Establishment" was "bitterly divided on this issue" of the Jewish Councils.4 As the accounts of contemporaries attest, this division was already apparent in the Warsaw Ghetto more than twenty years earlier. There, Adam Czerniaków, a highly cultured 60 year-old Polish speaking Jewish engineer, neither a rabbi nor a believer, was the head of the 24 member Warsaw Jewish Council. He had many staunch supporters but others, particularly those involved in resistance movements, distrusted him and accused him of collaboration with the Nazis. In July 1942, he swallowed cyanide rather than sign the order to round up and deport all Jews, including children, from the ghetto.Emmanuel Ringelblum, whose extraordinary journal records events in Warsaw chronologically and meticulously from January 1940 to December 1942, notes that some considered Czerniaków "a martyr... honestly fulfilling his duty... an idol... [whose] word is command." Ringelblum himself, however, deemed him "incompetent" and "weak": "The suicide of Czerniaków—too late, a sign of weakness—should have called for resistance—a weak man."5 Janusz Korczak, on the other hand, who ran an orphanage in the ghetto for 200 children, was far more sympathetic toward Czerniaków, one of his close friends who also had a passionate interest in children's welfare. Korczak, whose diary, unlike Ringelblum's, is inward and abstract, does not speak openly about the Jewish Council. But Korczak was horrified by the death of children in the ghetto. Like Czerniaków, Korczak carried cyanide, but he chose not to take it. Unwilling to abandon his orphans and convinced of their individual dignity, he wanted to prepare them for their inevitable demise. To this end, just three weeks before they were all deported, Korczak had the children perform Tagore's The Post Office in the hope that they might thereby welcome death and not be afraid of it.6 Korczak's... (shrink)

By “physical probability” I mean the empirical concept of probability in ordinary language. It can be represented as a function of an experiment type and an outcome type, which explains how non-extreme physical probabilities are compatible with determinism. Two principles, called specification and independence, put restrictions on the existence of physical probabilities, while a principle of direct inference connects physical probability with inductive probability. This account avoids a variety of weaknesses in the theories of Levi and Lewis.

_Alessandra Lemma - Winner of the Levy-Goldfarb Award for Child Psychoanalysis!_ The contemporary relevance of psychoanalysis is being increasingly questioned; _Off the Couch_ challenges this view, demonstrating that psychoanalytic thinking and its applications are both innovative and relevant, in particular to the management and treatment of more disturbed and difficult to engage patient groups. Chapters address: clinical applications in diverse settings across the age range the relevance of psychoanalytic thinking to the practice of CBT, psychosomatics and general psychiatry the contribution (...) of psychoanalytic thinking to mental health policy and the politics of conflict and mediation. This book suggests that psychoanalysis has a vital position within the public health sector and discusses how it can be better utilised in the treatment of a range of mental health problems. It also highlights the role of empirical research in providing a robust evidence base. _Off the Couch_ will be essential reading for those practicing in the field of mental health and will also be useful for anyone involved in the development of mental health and public policies. It will ensure that practitioners and supervisors have a clear insight into how psychoanalysis can be applied in general healthcare. (shrink)

The concept of luck has played an important role in debates concerning free will and moral responsibility, yet participants in these debates have relied upon an intuitive notion of what luck is. Neil Levy develops an account of luck, which is then applied to the free will debate. He argues that the standard luck objection succeeds against common accounts of libertarian free will, but that it is possible to amend libertarian accounts so that they are no more vulnerable to luck (...) than is compatibilism. But compatibilist accounts of luck are themselves vulnerable to a powerful luck objection: historical compatibilisms cannot satisfactorily explain how agents can take responsibility for their constitutive luck; non-historical compatibilisms run into insurmountable difficulties with the epistemic condition on control over action. Levy argues that because epistemic conditions on control are so demanding that they are rarely satisfied, agents are not blameworthy for performing actions that they take to be best in a given situation. It follows that if there are any actions for which agents are responsible, they are akratic actions; but even these are unacceptably subject to luck. Levy goes on to discuss recent non-historical compatibilisms, and argues that they do not offer a viable alternative to control-based compatibilisms. He suggests that luck undermines our freedom and moral responsibility no matter whether determinism is true or not. (shrink)

Abstract The typical explanation of an event or process which attracts the label ‘conspiracy theory’ is an explanation that conflicts with the account advanced by the relevant epistemic authorities. I argue that both for the layperson and for the intellectual, it is almost never rational to accept such a conspiracy theory. Knowledge is not merely shallowly social, in the manner recognized by social epistemology, it is also constitutively social: many kinds of knowledge only become accessible thanks to the agent's embedding (...) in an environment that includes other epistemic agents. Moreover, advances in knowledge typically require ongoing immersion in this social environment. But the intellectual who embraces a conspiracy theory risks cutting herself off from this environment, and therefore epistemically disabling herself. Embracing a conspiracy theory therefore places at risk the ability to engage in genuine enquiry, including the enquiry needed properly to evaluate the conspiracy theory. (shrink)

Centre for Applied Philosophy and Public Ethics University of Melbourne, Parkville, 3010, Australia and.

Idealization and abstraction are central concepts in the philosophy of science and in science itself. My goal in this paper is suggest an account of these concepts, building on and refining an existing view due to Jones Idealization XII: correcting the model. Idealization and abstraction in the sciences, vol 86. Rodopi, Amsterdam, pp 173–217, 2005) and Godfrey-Smith Mapping the future of biology: evolving concepts and theories. Springer, Berlin, 2009). On this line of thought, abstraction—which I call, for reasons to be (...) explained, abstractness—involves the omission of detail, whereas idealization consists in a deliberate mismatch between a description and the world. I will suggest that while the core idea underlying these authors’ view is correct, they make several assumptions and stipulations that are best avoided. For one thing, they tie abstractness too close to truth. For another, they do not allow sufficient room to the difference between idealization and error. Taking these points into account leads to a refined account of the distinction, in which abstractness is seen in terms of relative richness of detail, and idealization is seen as closely connected with the knowledge and intentions of idealizers. I lay out these accounts in turn, and then discuss the relationship between the two concepts, and several other upshots of the present way of construing the distinction. (shrink)

There is a robust scientific consensus concerning climate change and evolution. But many people reject these expert views, in favour of beliefs that are strongly at variance with the evidence. It is tempting to try to explain these beliefs by reference to ignorance or irrationality, but those who reject the expert view seem often to be no worse informed or any less rational than the majority of those who accept it. It is also tempting to try to explain these beliefs (...) by reference to epistemic overconfidence. However, this kind of overconfidence is apparently ubiquitous, so by itself it cannot explain the difference between those who accept and those who reject expert views. Instead, I will suggest that the difference is in important part explained by differential patterns of epistemic deference, and these patterns, in turn, are explained by the cues that we use to filter testimony. We rely on cues of benevolence and competence to distinguish reliable from unreliable testifiers, but when debates become deeply politicized, asserting a claim may itself constitute signalling lack of reliability. (shrink)

The question of the psychopath's responsibility for his or her wrongdoing has received considerable attention. Much of this attention has been directed toward whether psychopaths are a counterexample to motivational internalism (MI): Do they possess normal moral beliefs, which fail to motivate them? In this paper, I argue that this is a question that remains conceptually and empirically intractable, and that we ought to settle the psychopath's responsibility in some other way. I argue that recent empirical work on the moral (...) judgments of psychopaths provides us with good reason to think that they are not fully responsible agents, because their actions cannot express the kinds of ill-will toward others that grounds attributions of distinctively moral responsibility. I defend this view against objections, especially those due to an influential account of moral responsibility that holds that moral knowledge is not necessary for responsibility. (shrink)

Some philosophers have criticized the use of psychopharmaceuticals on the grounds that even if these drugs enhance the person using them, they threaten their authenticity. Others have replied by pointing out that the conception of authenticity upon which this argument rests is contestable; on a rival conception, psychopharmaceuticals might be used to enhance our authenticity. Since, however, it is difficult to decide between these competing conceptions of authenticity, the debate seems to end in a stalemate. I suggest that we need (...) not resolve this debate to end the stalemate. New technologies which alter the self can be understood within the framework of the first conception of authenticity, I suggest, not as threatening the authentic self, but rather as bringing the outward appearance of the self into line with its deepest essence. Since psychopharmaceutical use can plausibly be understood on this model, it can be seen as enhancing our authenticity on either conception. (shrink)

An influential model holds that obsessive–compulsive disorder is caused by distinctive personality traits and belief biases. But a substantial number of sufferers do not manifest these traits. I propose a predictive coding account of the disorder, which explains both the symptoms and the cognitive traits. On this account, OCD centrally involves heightened and dysfunctionally focused attention to normally unattended sensory and motor representations. As these representations have contents that predict catastrophic outcomes, patients are disposed to engage in behaviors and mental (...) rituals designed to forestall these outcomes or to produce more precise information. The same representations also cause the cognitive traits characteristic of sufferers. (shrink)

I argue that the intellectualist account of knowledge-how, according to which agents have the knowledge-how to \ in virtue of standing in an appropriate relation to a proposition, is only half right. On the composition view defended here, knowledge-how at least typically requires both propositional knowledge and motor representations. Motor representations are not mere dispositions to behavior because they have representational content, and they play a central role in realizing the intelligence in knowledge-how. But since motor representations are not propositional, (...) propositional knowledge is not sufficient for knowledge-how. (shrink)

The United States Supreme Court hasrecently ruled that virtual child pornographyis protected free speech, partly on the groundsthat virtual pornography does not harm actualchildren. I review the evidence for thecontention that virtual pornography might harmchildren, and find that it is, at best,inconclusive. Saying that virtual childpornography does not harm actual children isnot to say that it is completely harmless,however. Child pornography, actual or virtual,necessarily eroticizes inequality; in a sexistsociety it therefore contributes to thesubordination of women.

The self-deceived are usually held to be moral responsible for their state. I argue that this attribution of responsibility makes sense only against the background of the traditional conception of self-deception, a conception that is now widely rejected. In its place, a new conception of self-deception has been articulated, which requires neither intentional action by self-deceived agents, nor that they possess contradictory beliefs. This new conception has neither need nor place for attributions of moral responsibility to the self-deceived in paradigmatic (...) cases. Accordingly, we should take the final step toward abandoning the traditional conception, and drop the automatic attribution of responsibility. Self-deception is simply a kind of mistake, and has no more necessary connection to culpability than have other intellectual errors. (shrink)

Recent work in neuroimaging suggests that some patients diagnosed as being in the persistent vegetative state are actually conscious. In this paper, we critically examine this new evidence. We argue that though it remains open to alternative interpretations, it strongly suggests the presence of consciousness in some patients. However, we argue that its ethical significance is less than many people seem to think. There are several different kinds of consciousness, and though all kinds of consciousness have some ethical significance, different (...) kinds underwrite different kinds of moral value. Demonstrating that patients have phenomenal consciousness — conscious states with some kind of qualitative feel to them — shows that they are moral patients, whose welfare must be taken into consideration. But only if they are subjects of a sophisticated kind of access consciousness — where access consciousness entails global availability of information to cognitive systems — are they persons, in the technical sense of the word employed by philosophers. In this sense, being a person is having the full moral status of ordinary human beings. We call for further research which might settle whether patients who manifest signs of consciousness possess the sophisticated kind of access consciousness required for personhood. (shrink)

I develop an account of weakness of the will that is driven by experimental evidence from cognitive and social psychology. I will argue that this account demonstrates that there is no such thing as weakness of the will: no psychological kind corresponds to it. Instead, weakness of the will ought to be understood as depletion of System II resources. Neither the explanatory purposes of psychology nor our practical purposes as agents are well-served by retaining the concept. I therefore suggest that (...) we ought to jettison it, in favour of the vocabulary and concepts of cognitive psychology. (shrink)

Recent findings in neuroscience, evolutionary biology and psychology seem to threaten the existence or the objectivity of morality. Moral theory and practice is founded, ultimately, upon moral intuition, but these empirical findings seem to show that our intuitions are responses to nonmoral features of the world, not to moral properties. They therefore might be taken to show that our moral intuitions are systematically unreliable. I examine three cognitive scientific challenges to morality, and suggest possible lines of reply to them. I (...) divide these replies into two groups: we might confront the threat, showing that it does not have the claimed implications for morality; or we might bite the bullet, accepting that the claims have moral implications, but incorporating these claims into morality. I suggest that unless we are able to bite the bullet, when confronted by cognitive scientific challenges, there is a real possibility that morality will be threatened. This fact gives us a weighty reason to adopt a metaethics that makes it relatively easy to bite cognitive scientific bullets. Moral constructivism, in one of its many forms, makes these bullets more palatable; therefore, the cognitive scientific challenges provide us with an additional reason to adopt a constructivist metaethics. (shrink)

In this article we survey six recent developments in the philosophical literature on free will and moral responsibility: (1) Harry Frankfurt's argument that moral responsibility does not require the freedom to do otherwise; (2) the heightened focus upon the source of free actions; (3) the debate over whether moral responsibility is an essentially historical concept; (4) recent compatibilist attempts to resurrect the thesis that moral responsibility requires the freedom to do otherwise; (5) the role of the control condition in free (...) will and moral responsibility, and finally (6) the debate centering on luck. (shrink)

So-called downshifters seek more meaningful lives by decreasing the amount of time they devote to work, leaving more time for the valuable goods of friendship, family and personal development. But though these are indeed meaning-conferring activities, they do not have the right structure to count as superlatively meaningful. Only in work – of a certain kind – can superlative meaning be found. It is by active engagements in projects, which are activities of the right structure, dedicated to the achievement of (...) goods beyond ourselves, that we make our lives superlatively meaningful. (shrink)

The principle of Conditional Excluded Middle has been a matter of longstanding controversy in both semantics and metaphysics. The principle suggests (among other things) that for any coin that isn't flipped, there is a fact of the matter about how it would have landed if it had been flipped: either it would have landed heads, or it would have landed tails. This view has gained support from linguistic evidence indicating that ‘would’ commutes with negation (e.g., ‘not: if A, would C’ (...) is equivalent to ‘if A, would not C’). There is, however, a long list of operators that similarly appear to commute with negation, even though the corresponding excluded middle principles are indefensible. We suggest that the data supporting Conditional Excluded Middle is best explained as a pragmatic effect. (shrink)

Children, even very young children, distinguish moral from conventional transgressions, inasmuch as they hold that the former, but not the latter, would still be wrong if there was no rule prohibiting them. Many people have taken this finding as evidence that morality is objective, and therefore universal. I argue that reflection on the phenomenon of imaginative resistance will lead us to question these claims. If a concept applies in virtue of the obtaining of a set of more basic facts, then (...) it is authority independent, and we therefore resist the attempts of authorities to claim that it does not apply. Thus, the moral/conventional distinction is a product of imaginative resistance to claims that a concept does not apply when its supervenience base is in place (or vice versa). All we can rightfully conclude from the fact that children are disposed to make the moral/conventional distinction is that our moral concepts belong to the class of authority-independent concepts. Though the set of basic facts in virtue of which an authority-independent concept obtains must be objective, the concept itself might be conventional, inasmuch as we could easily draw its boundaries wider or narrower, or fail to have a concept that corresponds to these properties at all. (shrink)

There is good evidence that many people harbour attitudes that conflict with those they endorse. In the language of social psychology, they seem to have implicit attitudes that conflict with their explicit beliefs. There has been a great deal of attention paid to the question whether agents like this are responsible for actions caused by their implicit attitudes, but much less to the question whether they can rightly be described as racist in virtue of harbouring them. In this paper, I (...) attempt to answer this question using three different standards, providing by the three dominant kinds of accounts of racism. I argue that on none of these accounts should agents like this be described as racists. However, it would be misleading to say, without qualification, that they are not racists. On none of these accounts are agents like this entirely off the hook. (shrink)

Preface Introduction Christopher J. Berry: Adam Smith: Outline of Life, Times, and Legacy Part One: Adam Smith: Heritage and Contemporaries 1: Nicholas Phillipson: Adam Smith: A Biographer's Reflections 2: Leonidas Montes: Newtonianism and Adam Smith 3: Dennis C. Rasmussen: Adam Smith and Rousseau: Enlightenment and counter-Enlightenment 4: Christopher J. Berry: Adam Smith and Early Modern Thought Part Two: Adam Smith on Language, Art and Culture 5: Catherine Labio: Adam Smith's Aesthetics 6: James Chandler: Adam Smith as Critic 7: Michael C. (...) Amrozowicz: Adam Smith: History and Poetics 8: C. Jan Swearingen: Adam Smith on Language and Rhetoric: The Ethics of Style, Character, and Propriety Part Three: Adam Smith and Moral Philosophy 9: Christel Fricke: Adam Smith: The Sympathetic Process and the Origin and Function of Conscience 10: Duncan Kelly: Adam Smith and the Limits of Sympathy 11: Ryan Patrick Hanley: Adam Smith and Virtue 12: Eugene Heath: Adam Smith and Self-Interest Part Four: Adam Smith and Economics 13: Tony Aspromourgos: Adam Smith on Labour and Capital 14: Nerio Naldi: Adam Smith on Value and Prices 15: Hugh Rockoff: Adam Smith on Money, Banking, and the Price Level 16: Maria Pia Paganelli: Commercial Relations: from Adam Smith to Field Experiments Part Five: Adam Smith on History and Politics 17: Spiros Tegos: Adam Smith: Theorist of Corruption 18: David M. Levy & Sandra J. Peart: Adam Smith and the State: Language and Reform 19: Fabrizio Simon: Adam Smith and the Law 20: Edwin van de Haar: Adam Smith on Empire and International Relations Part Six: Adam Smith on Social Relations 21: Richard Boyd: Adam Smith, Civility, and Civil Society 22: Gavin Kennedy: Adam Smith on Religion 23: Samuel Fleischacker: Adam Smith and Equality 24: Maureen Harkin: Adam Smith and Women Part Seven; Adam Smith: Legacy and Influence 25: Spencer J. Pack: Adam Smith and Marx 26: Craig Smith: Adam Smith and the New Right 27: Tom Campbell: Adam Smith: Methods, Morals and Markets 28: Amartya Sen: The Contemporary Relevance of Adam Smith. (shrink)

The Hodgkin–Huxley (HH) model of the action potential is a theoretical pillar of modern neurobiology. In a number of recent publications, Carl Craver ([2006], [2007], [2008]) has argued that the model is explanatorily deficient because it does not reveal enough about underlying molecular mechanisms. I offer an alternative picture of the HH model, according to which it deliberately abstracts from molecular specifics. By doing so, the model explains whole-cell behaviour as the product of a mass of underlying low-level events. The (...) issue goes beyond cellular neurobiology, for the strategy of abstraction exhibited in the HH case is found in a range of biological contexts. I discuss why it has been largely neglected by advocates of the mechanist approach to explanation. 1 Introduction2 A Primer on the HH Model2.1 The basic qualitative picture2.2 The quantitative model3 Interlude: What Did Hodgkin and Huxley Think?4 Craver’s View4.1 Mechanistic explanation4.2 Sketches4.3 Craver's view: The HH model as a mechanism sketch5 An Alternative View of the HH Model5.1 Another look at the equations5.2 The discrete-gating picture5.3 The road paved by Hodgkin and Huxley5.4 Summary and comparison to Craver6 Conclusion: The HH Model and Mechanistic Explanation6.1 Sketches and abstractions6.2 Why has aggregative abstraction been overlooked? (shrink)

I distinguish three theses associated with the new mechanistic philosophy – concerning causation, explanation and scientific methodology. Advocates of each thesis are identified and relationships among them are outlined. I then look at some recent work on natural selection and mechanisms. There, attention to different kinds of New Mechanism significantly affects of what is at stake.

Traditional wisdom dictates that statistical model outputs are estimates, not measurements. Despite this, statistical models are employed as measurement instruments in the social sciences. In this article, I scrutinize the use of a specific model—the logit model—for psychological measurement. Given the adoption of a criterion for measurement that I call comparability, I show that the logit model fails to yield measurements due to properties that follow from its fixed residual variance.

We present and defend a Thomistic cosmological argument that runs independently of the principle of sufficient reason, sidestepping perhaps two of the most recurrent objections to cosmological reasoning: (a) the possibility of brute facts (i.e., that not everything needs an adequate explanation of its existence) and (b) the accusation of the composition fallacy. Drawing upon the work of Barry Miller, we show that any contingent entity like Thumper the rabbit, upon metaphysical analysis, is either a contradictory structure and therefore an (...) impossible existent or else points towards an extrinsic cause for the unity of its really distinct metaphysical parts (namely, its essence and its existence). This conclusion enables the inference that only an uncaused cause with no really distinct metaphysical parts can ultimately produce anything with really distinct metaphysical parts. We then suggest it is not implausible that this entity is God. (shrink)

Dynamic semantics violates numerous classical laws, including Non-Contradiction. Proponents of dynamic semantics have offered no explanation for this behavior, and some critics consider this result to be strong evidence against the tenability of the dynamic program. I defend and explain failures of Non-Contradiction by comparing dynamic semantics and classical, truth conditional semantics in terms of their idealizing assumptions. I demonstrate that dynamic semantics rejects context fixity, an idealizing assumption that truth-conditional semantics typically adopts. I then argue that any semantics which (...) rejects context fixity should, by the classical semanticist’s own lights, violate Non-Contradiction under certain circumstances. I then demonstrate that dynamic semantics violates Non-Contradiction in all and only those circumstances. I subsequently appeal to this insight to vindicate some of dynamic semantics’ more controversial predictions. I close by suggesting that discussion of idealizing assumptions, common in the sciences, is similarly crucial to fruitful discussion in natural language semantics. (shrink)