Newborn neurons are generated in the adult hippocampus from a pool of self‐renewing stem cells located in the subgranular zone (SGZ) of the dentate gyrus. Their activation, proliferation, and maturation depend on a host of environmental and cellular factors but, until recently, the contribution of local neuronal circuitry to this process was relatively unknown. In their recent publication, Song and colleagues have uncovered a novel circuit‐based mechanism by which release of the neurotransmitter, γ‐aminobutyric acid (GABA), from parvalbumin‐expressing (PV) interneurons, can (...) hold radial glia‐like (RGL) stem cells of the adult SGZ in a quiescent state. This tonic GABAergic signal, dependent upon the activation of γ2 subunit‐containing GABAA receptors of RGL stem cells, can thus prevent their proliferation and subsequent maturation or return them to quiescence if previously activated. PV interneurons are thus capable of suppressing neurogenesis during periods of high network activity and facilitating neurogenesis when network activity is low. (shrink)

Much philosophical attention has been devoted to “The Land Ethic,” especially by Anglo-American philosophers, but little has been paid to A Sand County Almanac as a whole. Read through the lens of continental philosophy, A Sand County Almanac promulgates an evolutionary-ecological world view and effects a personal self- and a species-specific Self-transformation in its audience. It’s author, Aldo Leopold, realizes these aims through descriptive reflection that has something in common with phenomenology-although Leopold was by no stretch of the imagination a (...) phenomenologist. Consideration of human-animal intersubjectivity, thematized in A Sand County Almanac, brings to light the moral problem of hunting and killing animal subjects. Leopold does not confront that problem, but it is confronted and resolved by Jose Ortega y Gassett, Henry Beston, and Paul Shepard in terms of an appropriate human relationship with wild-animal Others. Comparison with the genuinely Other-based Leopold-Ortega-Beston-Shepard wild-animal ethic shows the purportedly Other-based humanand possibly animal ethic of Emmanuel Levinas actually to be Same-based after all. (shrink)

Pt. I. The apparent good. Evaluative cognition -- Perceiving the good -- Phantasia and the apparent good -- pt. II. The apparent good and non-rational motivation. Passions and the apparent good -- Akrasia and the apparent good -- pt. III. The apparent good and rational motivation. Phantasia and deliberation -- Happiness, virtue, and the apparent good -- Practical induction -- Conclusion : Aristotle's practical empiricism.

Plato's Epistemology presents an original interpretation of one of the central topics in Plato's work: epistemology. Moss argues, against the grain of much modern scholarship, that Plato's epistemology is radically different from our own.

did plato and aristotle have anything to say about belief? The answer to this question might seem blindingly obvious: of course they did. Plato distinguishes belief from knowledge in the Meno, Republic, and Theaetetus, and Aristotle does so in the Posterior Analytics. Plato distinguishes belief from perception in the Theaetetus, and Aristotle does so in the De anima. They talk about the distinction between true and false beliefs, and the ways in which belief can mislead and the ways in which (...) it can steer us aright. Indeed, they make belief a central component of their epistemologies.The view underlying these claims—one so widespread these days as to remain largely unquestioned—is that when Plato and Aristotle talk... (shrink)

Many tasks in statistical and causal inference can be construed as problems of entailment in a suitable formal language. We ask whether those problems are more difficult, from a computational perspective, for causal probabilistic languages than for pure probabilistic (or “associational”) languages. Despite several senses in which causal reasoning is indeed more complex—both expressively and inferentially—we show that causal entailment (or satisfiability) problems can be systematically and robustly reduced to purely probabilistic problems. Thus there is no jump in computational complexity. (...) Along the way we answer several open problems concerning the complexity of well-known probability logics, in particular demonstrating the ${\exists \mathbb {R}}$ -completeness of a polynomial probability calculus, as well as a seemingly much simpler system, the logic of comparative conditional probability. (shrink)

How should one understand knowledge-wh ascriptions? That is, how should one understand claims such as ‘‘I know where the car is parked,’’ which feature an interrogative complement? The received view is that knowledge-wh reduces to knowledge that p, where p happens to be the answer to the question Q denoted by the wh-clause. I will argue that knowledge-wh includes the question—to know-wh is to know that p, as the answer to Q. I will then argue that knowledge-that includes a contextually (...) implicit question. I will conclude that knowledge is a question-relative state. Knowing is knowing the answer, and whether one knows the answer depends (in part) on the question. (shrink)

Discovering someone disagrees with you is a common occurrence. The question of epistemic significance of disagreement concerns how discovering that another disagrees with you affects the rationality of your beliefs on that topic. This book examines the answers that have been proposed to this question, and presents and defends its own answer.

This paper argues that several leading theories of subjunctive conditionals are incompatible with ordinary intuitions about what credences we ought to have in subjunctive conditionals. In short, our theory of subjunctives should intuitively display semantic humility, i.e. our semantic theory should deliver the truth conditions of sentences without pronouncing on whether those conditions actually obtain. In addition to describing intuitions about subjunctive conditionals, I argue that we can derive these ordinary intuitions from justified premises, and I answer a possible worry (...) for my derivation by refuting a subjunctive triviality result modeled on (Lewis 1976). I conclude that the debate over the correct theory of subjunctive conditionals requires settling meta-philosophical questions about the relative value of various virtues of first-order theories of subjunctive conditionals. (shrink)

Has the renewal of interest in the ostensible agency of living beings signaled an advance from a merely heuristic Kantian sense of purposiveness to an unequivocally, empirically grounded research program or are there as yet hidden tensions or contradictions in, for example, the organizational autonomy approach to natural agency? Can normativity be found to be immanent in nature but only beginning with the living cell or must a thoroughgoing naturalism find the seeds of normativity immanent throughout abiotic as well as (...) biotic nature? Beginning with a brief exposition of Kant´s influential treatment and recommendation for how to methodologically combine what he took to be the inevitable epistemological limit to explaining the origins of ostensible biotic purposefulness with the legitimate intentions of scientific research and explanation, this essay will critically engage with three recent essays that attempt to grapple with the preceding questions. Having putatively raised questions about the consistency and adequacy of each of the individual positions, the essay will attempt to move synthetically, drawing upon aspects of all three contributions, in the direction of a “cooperativity theoretic” approach to incipient natural normativity and agency. (shrink)

Traditional procedures for rational updating fail when it comes to self-locating opinions, such as your credences about where you are and what time it is. This paper develops an updating procedure for rational agents with self-locating beliefs. In short, I argue that rational updating can be factored into two steps. The first step uses information you recall from your previous self to form a hypothetical credence distribution, and the second step changes this hypothetical distribution to reflect information you have genuinely (...) learned as time has passed. While the second step resembles traditional procedures of updating by conditionalization, the first is best understood by analogy to traditional models of how agents transmit self-locating opinions through ordinary interpersonal communication. (shrink)

de Anima III.10 characterizes akrasia as a conflict between phantasia (“imagination”) on one side and rational cognition on the other: the akratic agent is torn between an appetite for what appears good to her phantasia and a rational desire for what her intellect believes good. This entails that akrasia is parallel to certain cases of perceptual illusion. Drawing on Aristotle's discussion of such cases in the de Anima and de Insomniis , I use this parallel to illuminate the difficult discussion (...) of akrasia in Nicomachean Ethics VII.3, arguing that its account of akrasia as involving ignorance is compatible with, and in fact crucially supplements, the more straightforward account we find elsewhere in the corpus of akrasia as a struggle between desires. (shrink)

In this study of events and their places in our language and thought, Bennett propounds and defends views about what kind of item an event is, how the language of events works, and about how these two themes are interrelated. He argues that most of the supposedly metaphysical literature is really about the semantics of their names, and that the true metaphysic of events--known by Leibniz and rediscovered by Kim--has not been universally accepted because it has been tarred with the (...) brush of a false semantic theory. (shrink)

" Here Jonathan Lear argues that irony is one of the tools we use to live seriously, to get the hang of becoming human.

Stoics and Sceptics distinguish belief (doxa) from a representationally and functionally similar but sub-doxastic state: passive yielding to appearance. Belief requires active assent to appearances, that is, affirmation of the appearances as true. I trace the roots of this view to Plato's accounts of doxa in the Republic and Theaetetus. In the Republic, eikasia and pistis (imaging and conviction) are distinguished by their objects, appearances versus ordinary objects; in the Theaetetus, perception and doxa are distinguished by their objects, proper perceptibles (...) versus ‘commons’, including being. But underlying these ontological distinctions is a psychological one: the lower mental states are confined to their lower objects because they are passive; the higher mental states have access to higher objects because they result from questioning appearances and making active affirmations about how things are. This doctrine of doxa anticipates both the Hellenistic one and modern accounts of belief as ‘aiming at truth’; it also shows Plato's views of doxa to have more in their favour philosophically and to cohere better with one another than generally thought. (shrink)

Ichikawa and Jarvis offer a new rationalist theory of mental content and defend a traditional epistemology of philosophy. They argue that philosophical inquiry is continuous with non-philosophical inquiry, and can be genuinely a priori, and that intuitions do not play an important role in mental content or the a priori.

ABSTRACT “Meister Eckhart’s Mysticism in Comparison with Zen Buddhism” originally appeared as the concluding section of Ueda Shizuteru’s first book, Die Gottesgeburt in der Seele und der Durchbruch zur Gottheit: Die mystische Anthropologie Meister Eckharts und ihre Konfrontation mit der Mystik des Zen-Buddhismus. It was first published in 1965 as an expanded version of Ueda’s doctoral dissertation, which was written under the supervision of Ernst Benz at the University of Marburg. Ueda’s careful analysis not only illuminates important points of affinity (...) between Eckhart and Zen, but also explains why Eckhart’s mysticism cannot be simply interchanged with Zen Buddhism. To allow the reader to read for themselves, I kept all interpretative notes to a minimum. The text is translated from the most recent edition of the German text, published in 2018 by Verlag Karl Alber, and edited by Wolf Burbat. The German pagination is interpolated in bold throughout the text. (shrink)

This chapter contains sections titled: Notes.

Conditional sentences are among the most intriguing and puzzling features of language, and analysis of their meaning and function has important implications for, and uses in, many areas of philosophy. Jonathan Bennett, one of the world's leading experts, distils many years' work and teaching into this Philosophical Guide to Conditionals, the fullest and most authoritative treatment of the subject. An ideal introduction for undergraduates with a philosophical grounding, it also offers a rich source of illumination and stimulation for graduate (...) students and professional philosophers. (shrink)

Aristotle's De Anima discusses the psychological causes of what he calls locomotion – i.e, roughly, purpose-driven behavior. One cause is desire. The other is cognition, which falls into two kinds: thought (nous) and imagination (phantasia). Aristotle’s discussion is dense and confusing, but I argue that we can extract from it an account that is coherent, compelling, and that in many ways closely anticipates modern psychological theories, in particular Dual Processing theory. Animals and humans are driven to pursue objects that attract (...) us. Objects take on that power when we cognize them as valuable. If we rely on imagistic, automatic, uncontrolled processing mechanisms – Aristotle’s phantasia, which closely anticipates the modern notion of Type 1 processing – our resulting desires and actions will be impulsive. If we rely instead on rational, critical, deliberative capacities – Aristotle’s thought, which closely anticipates the modern notion of Type 2 processing – our resulting desires and actions will be reflective. Animals are capable only of the first kind of behavior; the human psyche is constituted of an animal psyche united with an intellectual one, so we are capable of both. (shrink)

This paper provides a background to, detailed exploration, and then critique of, the influential notion of economic performativity. It begins with a broad sweep of the theoretical developments in economic sociology in the years before the advance of the performativity program. In doing so it outlines the theoretical quandary that performativity sought to move beyond. Having set the scene, it then looks at the performativity thesis in detail, explaining how it seeks to do away with modern ontological binaries like the (...) object/subject dichotomy. Once the performativity thesis has been unpacked, it is critiqued. Leading to the conclusion, that while there have been some benefits to the performative approach, especially in research looking at finance, the performativity thesis ultimately fails in its attempt to move beyond the ontology of “the moderns”, and does little to shift the debates in economic sociology that predated its popularity. (shrink)

The Dialectics of Absolute Nothingness examines the influence of German philosophical traditions on the development of the Kyoto School. Contributors explore the Kyoto School's engagement with Western thought, highlighting the centrality of German philosophy while also showing the many ways the Kyoto School critiques the philosophical traditions it incorporates.

Color provides an instance of a general puzzle about how to reconcile the picture of the world given to us by our ordinary experience with the picture of the world given to us by our best theoretical accounts. The Red and the Real offers a new approach to such longstanding philosophical puzzles about what colors are and how they fit into nature. It is responsive to a broad range of constraints --- both the ordinary constraints of color experience and the (...) more theoretical constraints of color science, psychology, semantics, and ontology. (shrink)

Conciliationism is the family of views that rationality requires agents to reduce confidence or suspend belief in p when acknowledged epistemic peers (i.e. agents who are (approximately) equally well-informed and intellectually capable) disagree about p. While Conciliationism is prima facie plausible, some have argued that Conciliationism is not an adequate theory of peer disagreement because it is self-undermining. Responses to this challenge can be put into two mutually exclusive and exhaustive groups: the Solution Responses which deny Conciliationism is self-undermining and (...) attempt to provide arguments which demonstrate this; and the Skeptical Responses which accept that Conciliationism is self-undermining but attempt to mitigate this result by arguing this is either impermanent and/or not very worrisome. I argue that, by Conciliationism’s own lights, both kinds of responses (almost certainly) fail to save Conciliationism from being self-undermining. Thus, Conciliationism is (almost certainly) permanently self-undermining. This result is significant because it demonstrates that Conciliationism is likely hopeless: there is likely nothing that can save Conciliationism from this challenge. I further argue that Conciliationism, like any view, should be abandoned if it is (almost certainly) hopeless. (shrink)

Students of perception have long puzzled over a range of cases in which perception seems to tell us distinct, and in some sense conflicting, things about the world. In the cases at issue, the perceptual system is capable of responding to a single stimulus — say, as manifested in the ways in which subjects sort that stimulus — in different ways. This paper is about these puzzling cases, and about how they should be characterized and accounted for within a general (...) theory of perception. After rehearsing the sort of case at issue (§1), I’ll examine critically some of the strategies by which philosophers and perceptual psychologists have attempted to account for them (§2). Finally, I’ll present an alternative computational account of the puzzle cases, argue that this view is superior to its competitors, and examine some of its implications (§3). (shrink)

Davidson's account of weakness of will dependsupon a parallel that he draws between practicaland theoretical reasoning. I argue that theparallel generates a misleading picture oftheoretical reasoning. Once the misleadingpicture is corrected, I conclude that theattempt to model akratic belief on Davidson'saccount of akratic action cannot work. Thearguments that deny the possibility of akraticbelief also undermine, more generally, variousattempts to assimilate theoretical to practicalreasoning.

This title presents a comprehensive guide to interpretative phenomenological analysis (IPA) which is an increasingly popular approach to qualitative inquiry taught to undergraduate and postgraduate students today.

The boldest and most unsettling of the major early modern philosophers, Spinoza, had a much greater, if often concealed, impact on the international intellectual scene and on the early Enlightenment than philosophers, historians, and political theorists have conventionally tended to recognize. Europe-wide efforts to prevent the reading public and university students learning about Spinoza, the man and his work, in the years immediately after his death in 1677, dominated much of his early reception owing to the revolutionary implications of his (...) thought for philosophy, religion, practical ethics and lifestyle, Bible criticism, and political theory. Nevertheless, contrary to what has sometimes been maintained, his general impact was immediate, very widespread, and profound. One of the main objectives of the book is to show how early and how deeply Leibniz, Bayle, Arnauld, Henry More, Anne Conway, Richard Baxter, Robert Boyle, Henry Oldenburg, Pierre-Daniel Huet, Richard Simon, and Nicholas Steno, among many others, were affected by and led to wrestle with his principal ideas. (shrink)

Epistemic Courage is a timely and thought-provoking exploration of the ethics of belief, which shows why epistemology is no mere academic abstraction - the question of what to believe couldn't be more urgent. Jonathan Ichikawa argues that a skeptical, negative bias about belief is connected to a conservative bias that reinforces the status quo.

The revised edition of this highly successful text provides a clear and accessible introduction to some of the most important questions of political philosophy. Organized around major issues, Wolff provides the structure that beginners need, while also introducing some distinctive ideas of his own.

I consider some hitherto unexplored examples of teleological language in the sciences. In explicating these examples, I aim to show (a) that such language is not the sole preserve of the biological sciences, and (b) that not all such talk is reducible to the ascription of functions. In chemistry and biochemistry, scientists explaining molecular rearrangements and protein folding talk informally of molecules rearranging “in order to” maximize stability. Evolutionary biologists, meanwhile, often speak of traits evolving “in order to” optimize some (...) fitness-relevant variable. I argue that in all three contexts such locutions are best interpreted as shorthands for more detailed explanations which, were we to spell them out in full, would show that the relevant process would robustly converge towards the same end-point despite variation in initial conditions. This suggests that, in biology, such talk presupposes a substantial form of adaptationism. The upshot is that such shorthands may be more applicable in the physical sciences than the biological. (shrink)