In the past two decades, reinforcement learning has become a popular framework for understanding brain function. A key component of RL models, prediction error, has been associated with neural signals throughout the brain, including subcortical nuclei, primary sensory cortices, and prefrontal cortex. Depending on the location in which activity is observed, the functional interpretation of prediction error may change: Prediction errors may reflect a discrepancy in the anticipated and actual value of reward, a signal indicating the salience or novelty of (...) a stimulus, and many other interpretations. Anterior cingulate cortex has long been recognized as a region involved in processing behavioral error, and recent computational models of the region have expanded this interpretation to include a more general role for the region in predicting likely events, broadly construed, and signaling deviations between expected and observed events. Ongoing modeling work investigating the interaction between ACC and additional regions involved in cognitive control suggests an even broader role for cingulate in computing a hierarchically structured surprise signal critical for learning models of the environment. The result is a predictive coding model of the frontal lobes, suggesting that predictive coding may be a unifying computational principle across the neocortex. (shrink)

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)

Are properties perfectly natural (or not) relative to worlds, or are they perfectly natural (or not) tout court? That is, could there be a property P that is instanti-ated at worlds w1 and w2, and is perfectly natural at w1 but not at w2? Here, we offer an original argument for the non-world-relativity of perfect naturalness. Along the way, we reply to a prima facie compelling argument for the contin-gency of perfect naturalness, based upon the connection between natural prop-erties and (...) laws of nature. (shrink)

This paper introduces a framework for thinking about ontological questions—in particular, the Special Composition Question—and shows how the framework might help support something like an account of restricted composition. The framework takes the form of an account of natural objects, in analogy with David Lewis’s account of natural properties. Objects, like properties, come in various metaphysical grades, from the fundamental, fully objective, perfectly natural objects to the nomologically otiose, maximally gerrymandered, perfectly non-natural objects. The perfectly natural objects, I argue, are (...) the mereological simples, and (roughly) a collection composes an object of degree-n naturalness if and only if its members are arranged F-wise, for some property F that appears in the degree-n natural laws. Arbitrary composites turn out to be perfectly non-natural objects and are metaphysical bystanders. Ordinary composite objects fall in between. Some—e.g., atoms—are very (though not perfectly) natural; others—e.g., tables—are highly non-natural. (shrink)

Intuitively, vagueness involves some sort of indeterminacy: if Plato is a borderline case of baldness, then there is no fact of the matter about whether or not he’s bald—he’s neither bald nor not bald. The leading formal treatments of such indeterminacy—three valued logic, supervaluationism, etc.—either fail to validate the classical theorems, or require that various classically valid inference rules be restricted. Here we show how a fully classical, yet indeterminist account of vagueness can be given within natural semantics, an alternative (...) semantics for classical proof theory. The key features of the account are: there is a single notion of truth—definite truth—and a single notion of validity; sentences can be true, false, or undetermined; all classical theorems and all classical inference rule are valid; the sorites argument is unsound; ‘definitely’ is treated as a meta-language predicate; higher-order vagueness is handled via semantic ascent. (shrink)

Quine, taking the molecular constitution of matter as a paradigmatic example, offers an account of the relation between theory confirmation and ontology. Elsewhere, he deploys a similar ontological methodology to argue for the existence of mathematical objects. Penelope Maddy considers the atomic/molecular theory in more historical detail. She argues that the actual ontological practices of science display a positivistic demand for “direct observation,” and that fulfillment of this demand allows us to distinguish molecules and other physical objects from mathematical abstracta. (...) However, the confirmation of the atomic/molecular theory and the development of scientists’ ontological attitudes towards atoms was more complicated and subtle than even Maddy supposes. The present paper argues that the history of the theory in fact supports neither Quine’s and Maddy’s accounts of scientific ontology. There was no general demand from scientists to “see” atoms before they were reckoned to be real; but neither did the indispensable appearance of atoms in the best theory of chemical combination suffice to convince scientists of their reality. (shrink)

Joshua Matthan Brown contrasts the concept of God assumed by most analytic philosophers, what he refers to as theistic personalism, with that of the apophatic conception of God endorsed by Eastern Christian thinkers. He maintains that the most powerful and economical response to contemporary arguments for atheism is to reject theistic personalism and adopt apophatic theism. Apophatic theists believe there is a lot we cannot say about God, taking the divine nature to be completely ineffable. Brown develops a coherent account (...) of divine ineffability and provides reasons for adopting this oft misunderstood view. Importantly, he draws upon apophatic theology, and its commitment to divine ineffability, to proffer an undercutting defeater for virtually every contemporary argument for the nonexistence of God. Along the way he anticipates and responds to several significant objections. (shrink)

It is often assumed that the first stage of many classical arguments for theism depends upon some version of the Principle of Sufficient Reason being true. Unfortunately for classical theists, PSR is a controversial thesis that has come under rather severe criticism in the contemporary literature. In this article, I grant for the sake of argument that every version of PSR is false. Thus, I concede with the critics of PSR, that it is possible that there is, at least, one (...) fact that is ontologically brute. I then proffer an epistemological challenge to ontological bruteness. Specifically, I argue that whenever a knowledge seeker, S, perceives some unexplained fact, F, it is never reasonable for S to believe F is ontologically brute. I conclude that, even if PSR is false, it is more reasonable to believe that the key premise in the first stage of classical arguments for theism is true. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:When Our Fathers Fall:A Thomistic-Confudan Approach to Lay Moral Correction of ClergyJoshua R. BrownIn this article, I seek to draw upon the resources of Thomas Aquinas and early Confucian philosophy in order to answer the following question: what are the responsibilities of lay Catholics to our priests and bishops as regards their personal moral rectification? This justifiably provokes two questions in reaction: why is this question worth pursuing, and (...) why pursue it via a comparative reading of Aquinas and Confucian philosophy?As to the first of these, the question I pose here is a specification of the larger responsibilities that fall to Christians according to the Scriptures. Galatians 5:1–2 puts the matter this way: "Brothers, even if a person is caught in some transgression, you who are spiritual should correct that one in a gentle spirit, looking to yourself, so that you may also not be tempted. Bear one another's burdens and so you will fulfill the law of Christ."1 In the theological tradition, "bearing one another's burdens" has been neatly and aptly represented in the principle of fraternal correction. The question I am focused on here, then, is how is fraternal correction properly offered from laity to clerics.Ultimately, articulating the shape or form of virtuous lay correction of clergy is actually a rather knotty problem. This is because the manner of the relationship between laity and clergy is not simply understood in terms [End Page 1025] of the bonds of Christian fraternity. Certainly, all Christians are brothers and sisters in Christ, for through His grace we have been adopted into the inheritance of the Kingdom of God as children of God (see Eph 5:1–5; 1 John 3:1–3). Yet the Church also recognizes that priests and bishops possess not simply a fraternal but also a paternal relationship to laity. As St. Paul again puts it to the church in Corinth, "I became your father in Christ Jesus through the gospel. Therefore, I urge you, be imitators of me" (1 Cor 4:15–16).I propose here that, although fraternal correction is a still useful concept for understanding how laity can morally correct clergy, it has an obvious weakness in that it corresponds to a particular relational analogy, that of fraternity, within which the difference in authority is not as great as the parent–child bond. Thus, fraternal correction is exceptionally useful for understanding how relationships with more or less equal rank of authority can function in terms of moral remonstration, such as how a lay Christian might fraternally correct another lay Christian, or a cleric fraternally correct a cleric. However, when it comes to clergy–laity relations, the shape of fraternal correction is far less clear, for there is a just and genuine disparity between them in the order of ecclesial, magisterial authority underlying the relationship, even if there is equality in other important respects.I argue here that lay responsibilities for correcting clergy can be fruitfully understood in terms of filial remonstration as understood by the Confucian philosophical tradition. Of course, there is one tremendous dissimilarity between Confucian views on the responsibilities for filial remonstration and those pertaining to the laity–clergy relationship: the former occur within and flow from the natural foundation of the parent–child bond, while the latter are not based on blood relations and natural duties. Yet, the same can be said about the language of fraternal correction, which draws upon the analogous duties of blood-kin applied to the spiritual fraternity of the Christian life. And so, it must be admitted that although the father–child relationship is used only analogously to describe the priest–laity relationship, it also accurately depicts the reality of that relationship. As John Paul II observed, priestly celibacy entails "a singular sharing in God's fatherhood and in the fruitfulness of the Church."2 The call of the priest to the celibate life is thus a call to fatherhood, indeed, a call to imitate and participate in the paternity of the triune God in a special and spiritual way. It seems clear that only a materialistic conception of things that denies the spiritual its proper... (shrink)

It is widely assumed in philosophy that there is a tight connection between semantics and metaphysics. Semantic theories about the meanings of natural language terms and phrases are taken to provide evidence for and against various metaphysical theses about the nature of non-linguistic parts of the world. Call this view the widespread thesis. I argue that the widespread thesis is mistaken: semantic theories do not generally have robust metaphysical consequences. I contend that the best arguments for the widespread thesis turn (...) on an interpretation of semantic theories according to which they are metaphysically illuminating: the metaphysical structure of the world is directly mirrored in the structure of the theory. Terms and existential quantification in the theory signal the existence of entities in the world, predicates signal the existence of properties, and the structures of set theoretic objects invoked by the theory directly correspond to structural features of the world. Such an interpretation is not the only one available, however, and it is a substantive philosophical (and linguistic) issue which interpretation is correct. Accordingly, I develop and defend an alternative interpretation of semantic theories according to which the structural features of these theories and of their theorems reflect biological and computational constraints on the architecture of the language faculty and historical contingencies in its evolutionary development. Supposedly metaphysically committing features of the theory—including the appearance of quantification and (ostensibly) referring terms—may thus be arepresentational artifacts of these constraints, rather than representational features that reflect metaphysical reality. To determine the metaphysical consequences of a semantic theory then, we must determine which of its features represent language-independent characteristics of the world and which are arepresentational consequences of the structure of the language faculty. To do this, however, we must have some prior idea what the language-independent world is like—that is, we must engage in prior metaphysical theorizing that is not beholden to the semantic theory itself. (shrink)

This thesis proffers a novel argument from order for the existence of God called the eutaxiological argument. It maintains the universe’s order and existence is fundamentally grounded in logos (λογος) or Mind. Unlike teleological design arguments, the eutaxiological argument is not concerned with the alleged end or purpose of some physical entity—e.g., the human eye, the bacteria flagellum, or the universe taken as a whole. It is, instead, concerned with the fact that the universe is ordered. It, thus, makes a (...) distinction between ‘order’ and ‘telos’. It argues that exemplifying essential order is both a necessary and sufficient condition for the existence of physical entities—and, indeed, for the existence of the universe—and that we need not think of physical order in terms of goals, purposes, or final causation. -/- Unlike most contemporary arguments for God’s existence, the eutaxiological argument argues for the existence of God as conceived of by apophatic theism. According to apophatic theism, the term ‘God’ denotes a unique, ontologically distinct, ineffable, logos that fundamentally grounds the universe’s order and existence from nothing. Historically, one can find proponents of apophatic theism in numerous philosophical and religious traditions—including some strands of Hinduism, Judaism, Neoplatonism, Christianity, and Islam. Its most ardent Christian exponents come from the Eastern Christian tradition. This dissertation offers a fresh defence of apophatic theism inspired by the Eastern Christian tradition. It responds to serious objections regarding the coherence of divine ineffability and the supposed logical incompatibility of apophatic theism with Christianity. (shrink)

Contemporary scholars of Chinese philosophy often presuppose that early China possessed a naturalistic worldview, devoid of any non-natural concepts, such as transcendence. Challenging this presupposition head-on, Joshua R. Brown and Alexus McLeod argue that non-naturalism and transcendence have a robust and significant place in early Chinese thought. -/- This book reveals that non-naturalist positions can be found in early Chinese texts, in topics including conceptions of the divine, cosmogony, and apophatic philosophy. Moreover, by closely examining a range of early Chinese (...) texts, and providing comparative readings of a number of Western texts and thinkers, the book offers a way of reading early Chinese Philosophy as consistent with the religious philosophy of the East and West, including the Abrahamic and the Brahmanistic religions. -/- Co-written by a philosopher and theologian, this book draws out unique insights into early Chinese thought, highlighting in particular new ways to consider a range of Chinese concepts, including tian, dao, li, and you/wu. (shrink)

With few exceptions, the field of Eastern Christian studies has primarily been concerned with historical-critical analysis, hermeneutics, and sociology. For the most part it has not attempted to bring Eastern Christian philosophy into serious engagement with contemporary thought. This volume seeks to redress the matter by bringing the Eastern Christian tradition into a meaningful dialogue with contemporary philosophy. It boasts a diverse group of scholars―specialists in ancient philosophy, analytic philosophy, and continental philosophy―who engage with a wide range of pressing issues. (...) Among other things, it addresses such topics as contemporary atheism, the metaphysics of action, religious epistemology, the philosophy of language, bioethics, the philosophy of race, and human rights. In so doing, it aims to introduce contemporary readers to unique perspectives and novel arguments often overlooked by mainstream anglophone philosophy. (shrink)

(2012). A Review of “Lowering Higher Education: The Rise of Corporate Universities and the Fall of Liberal Education”. Educational Studies: Vol. 48, No. 5, pp. 485-489.