The medial prefrontal cortex (mPFC) has been the subject of intense interest as a locus of cognitive control. Several computational models have been proposed to account for a range of effects, including error detection, conflict monitoring, error likelihood prediction, and numerous other effects observed with single-unit neurophysiology, fMRI, and lesion studies. Here, we review the state of computational models of cognitive control and offer a new theoretical synthesis of the mPFC as signaling response–outcome predictions. This new synthesis has two interacting (...) components. The first component learns to predict the various possible outcomes of a planned action, and the second component detects discrepancies between the actual and intended responses; the detected discrepancies in turn update the outcome predictions. This single construct is consistent with a wide array of performance monitoring effects in mPFC and suggests a unifying account of the cognitive role of medial PFC in performance monitoring. (shrink)

The year Leo Strauss published "Persecution and the Art of Writing" (1941), he prepared a lecture ("German Nihilism") that he never published. An analysis of this lecture shows that Strauss hadn't fully mastered the art of writing he'd discovered in others: his secrets are too exposed. In the context of "German Nihilism," it becomes clear that "Persecution and the Art of Writing" is about liberal persecution of authoritarianism, no the reverse, as liberals would assume. In response to recent apologias presenting (...) Strauss as a liberal who didn't "write between the lines," a Strauss-style reading of "German Nihilism" disproves both claims. (shrink)

The traditional view that all logical truths are metaphysically necessary has come under attack in recent years. The contrary claim is prominent in David Kaplan’s work on demonstratives, and Edward Zalta has argued that logical truths that are not necessary appear in modal languages supplemented only with some device for making reference to the actual world (and thus independently of whether demonstratives like ‘I’, ‘here’, and ‘now’ are present). If this latter claim can be sustained, it strikes close to the (...) heart of the traditional view. I begin this paper by discussing and refuting Zalta’s argument in the context of a language for propositional modal logic with an actuality connective (section 1). This involves showing that his argument in favor of real world validity his preferred explication of logical truth, is fallacious. Next (section 2) I argue for an alternative explication of logical truth called general validity. Since the rule of necessitation preserves general validity, the argument of section 2 provides a reason for affirming the traditional view. Finally (section 3) I show that the intuitive idea behind the discredited notion of real world validity finds legitimate expression in an object language connective for deep necessity. (shrink)

There has been much recent debate about Presentism among those who believe the doctrine to be nontrivial and true, those who believe it to be nontrivial and false, and those who believe it to be trivial — either trivially true or trivially false. Formulating Presentism precisely is problematic, which accounts for some of the controversy.

This article studies seriously actualistic quantified modal logics. A key component of the language is an abstraction operator by means of which predicates can be created out of complex formulas. This facilitates proof of a uniform substitution theorem: if a sentence is logically true, then any sentence that results from substituting a predicate abstract for each occurrence of a simple predicate abstract is also logically true. This solves a problem identified by Kripke early in the modern semantic study of quantified (...) modal logic. A tableau proof system is presented and proved sound and complete with respect to logical truth. The main focus is on seriously actualistic T, an extension of T, but the results established hold also for systems based on other propositional modal logics. Following Menzel it is shown that the formal language studied also supports an actualistic account of truth simpliciter. (shrink)

This dissertation elaborates and defends a certain broad orientation in the philosophy of mind---the inferentialism of Sellars and Brandom---and explores the striking consequences of that orientation for the field of practical reason. Inferentialism aims to understand the significance of various philosophically important concepts in terms of their role in inference. In the first part of the dissertation, I use an analysis of inference to draw a distinction between two types of practical reasoning: reasoning that takes facts as reasons for acting, (...) and reasoning that takes practical attitudes as reasons for acting. I argue that once we take a contextualist, non-foundationalist approach to practical reasoning---and we should---we realize that neither form of reasoning is more fundamental or primary than the other. This leaves behind a number of current debates between Humeans and their opponents. In the second part, I examine three important, practically-oriented mental states: intentions, evaluative beliefs, and desires. Using their role in practical reasoning as a guiding thread in my analysis, I arrive at novel accounts of each. I analyze intentions as practical commitments, the linchpin of practical reasoning, and reveal their deep connection with beliefs. Desires are understood in terms of intentions, reversing the usual direction of analysis, while evaluative beliefs are approached via a distinction between acknowledging and attributing practical states. (shrink)

Preventing War and Promoting Peace: A Guide for Health Professionals is an interdisciplinary study of how pervasive militarism creates a propensity for war through the influence of academia, economic policy, the defense industry, and the news media. Comprising contributions by academics and practitioners from the fields of public health, medicine, nursing, law, sociology, psychology, political science, and peace and conflict studies, as well as representatives from organizations active in war prevention, the book emphasizes the underlying preventable causes of war, particularly (...) militarism, and focuses on the methods health professionals can use to prevent war. Preventing War and Promoting Peace provides hard-hitting facts about the devastating health effects of war and a broad perspective on war and health, presenting a new paradigm for the proactive engagement of health professions in the prevention of war and the promotion of peace. (shrink)

In the fall of 1996 I taught a course at Fudan University in Shanghai dealing with medical ethics in America. As part of the course we spent some time on the heated American debate about abortion. The reaction of Chinese students was revealing.

No satisfactory answers were received for the following questions.

ABSTRACT Nuclear deterrence has struck many people as morally perplexing because it is a case in which it appears to be right to threaten, and in a sense intend, what it would be wrong to do. Section 1 explores the assumptions that are necessary to generate this moral paradox. Some moral theorists, however, have refused to embrace this paradox, contending instead that nuclear deterrence is immoral in principle precisely because it is wrong to threaten that which it would be immoral (...) to do. Section 2 rebuts this contention and seeks to reduce the apparent paradoxicality of nuclear deterrence to manageable proportions. This is not to maintain, though, that nuclear deterrence is morally permissible in the world in which we live; consequently, Section 3 surveys some of the factors relevant to a moral assessment of the legitimacy of the actual practice of nuclear deterrence. (shrink)