Perceptual Confidence is the view that perceptual experiences assign degrees of confidence. After introducing, clarifying, and motivating Perceptual Confidence, I catalogue some of its more interesting consequences, such as the way it blurs the distinction between veridical and illusory experiences, a distinction that is sometimes said to carry a lot of metaphysical weight. I also explain how Perceptual Confidence fills a hole in our best scientific theories of perception and why it implies that experiences don't have objective accuracy conditions.

A satisfactory contextualist theory of knowledge must provide an account of how knowledge varies across contexts. There are three contextualist proposals for developing such an account. This paper demonstrates that all of them are unacceptable. Contextualists have therefore failed to provide a satisfactory theory of knowledge.

Perceptual Confidence is the view that our conscious perceptual experiences assign confidence. In previous papers, I motivated it using first-personal evidence (Morrison, 2016), and Jessie Munton motivated it using normative evidence (Munton, 2016). In this paper, I will consider the extent to which it is motivated by third-personal evidence. I will argue that the current evidence is supportive but not decisive. I will then describe experiments that might provide stronger evidence. I hope to thereby provide a roadmap for future (...) research. (shrink)

I use an old challenge to motivate a new view. The old challenge is due to variation in our perceptions of secondary qualities. The challenge is to say whose perceptions are accurate. The new view is about how we manage to perceive secondary qualities, and thus manage to perceive them accurately or inaccurately. I call it perceptual structuralism. I first introduce the challenge and point out drawbacks with traditional responses. I spend the rest of the paper motivating and defending a (...) structuralist response. While I focus on color, both the challenge and the view generalize to the other secondary qualities. (shrink)

In “Perceptual Confidence,” I argue that our perceptual experiences assign degrees of confidence. In “Precision, not Confidence, Describes the Uncertainty of Perceptual Experience,” Rachel Denison disagrees. In this reply I first clarify what i mean by ‘perceptual experiences’, ‘assign’ and ‘confidence’. I then argue, contra Denison, that perception involves automatic categorization, and that there is an intrinsic difference between a blurry perception of a sharp image and a sharp perception of a blurry image. -/- .

According to anti-atomism, we represent color properties (e.g., red) in virtue of representing color relations (e.g., redder than). I motivate anti-atomism with a puzzle involving a series of pairwise indistinguishable chips. I then develop two versions of anti-atomism.

I will develop a new problem for almost all realist theories of colour. The problem involves fluctuations in our colour experiences that are due to visual noise rather than changes in the objects we are looking at.

Aquinas, Ockham, and Burdan all claim that a person can be numerically identical over time, despite changes in size, shape, and color. How can we reconcile this with the Indiscernibility of Identicals, the principle that numerical identity implies indiscernibility across time? Almost all contemporary metaphysicians regard the Indiscernibility of Identicals as axiomatic. But I will argue that Aquinas, Ockham, and Burdan would reject it, perhaps in favor of a principle restricted to indiscernibility at a time.

Spinoza’s claims about true ideas are central to the Treatise on the Emendation of the Intellect. It is therefore worth trying to reconstruct what he means when he says that an idea is true. I argue that the three leading interpretations – correspondence, coherence, and causal – don’t explain key passages. I then propose a new interpretation. Roughly, I propose that an idea is true if and only if it represents an essence and was derived in the right kind of (...) way by the intellect from an innate idea of one’s own essence. In the final section I sketch why I believe this interpretation extends to his claims about truth and adequacy in the Ethics. (shrink)

Spinoza claims that a person’s mind and body are one and the same. But he also claims that minds think and do not move, whereas bodies move and do not think. How can we reconcile these claims? I believe that Spinoza is building on a traditional view about identity over time. According to this view, identity over time is linked to essence, so that a thing that is now resting is identical to a thing that was previously moving, provided that (...) they share the same essence. I believe that Spinoza has a similar view about the identity of minds and bodies. In particular, a thing that is thinking in the attribute of thought is identical to a thing that is moving in the attribute of extension, provided that they share the same essence. (shrink)

Spinoza's causal axiom is at the foundation of the Ethics. I motivate, develop and defend a new interpretation that I call the ‘causally restricted interpretation’. This interpretation solves several longstanding puzzles and helps us better understand Spinoza's arguments for some of his most famous doctrines, including his parallelism doctrine and his theory of sense perception. It also undermines a widespread view about the relationship between the three fundamental, undefined notions in Spinoza's metaphysics: causation, conception and inherence.

I suggest a solution to two puzzles in Spinoza's metaphysics. The first puzzle involves the mind and the idea of the mind, in particular how they can be identical, even though the mind thinks about bodies and nothing else, whereas the idea of the mind thinks about ideas and nothing else. The second puzzle involves the mind and the idea of a thing that belongs to an unknown attribute, in particular how they can be identical, even though the mind thinks (...) about bodies and nothing else, whereas the idea thinks about things belonging to the unknown attribute and nothing else. I suggest that Spinoza would respond to both puzzles by rejecting the Indiscernibility of Identicals. (shrink)

Conception and causation are fundamental notions in Spinoza's metaphysics. I argue against the orthodox view that, due to the causal axiom, if one thing is conceived through another thing, then the second thing causes the first thing. My conclusion forces us to rethink Spinoza's entitlement to some of his core commitments, including the principle of sufficient reason, the parallelism doctrine and the conatus doctrine.

Executive functions (EFs) and impulsivity are dimensions of self-regulation that are both related to psychopathology. However, self-report measures of impulsivity and laboratory EF tasks typically display small correlations, and existing research indicates that impulsivity and EFs may tap separate aspects of self-regulation that independently statistically predict psychopathology in adulthood. However, relationships between EFs, impulsivity, and psychopathology may be different in childhood compared to adulthood. Here, we examine whether these patterns hold in the baseline assessment of the Adolescent Brain and Cognitive (...) Development (ABCD) sample, a national sample of over 11,000 children (including 749 twin pairs) ages 9–10 years. We examine the phenotypic and genetic relationships among latent variables for different components of EFs and multiple facets of impulsivity. Additionally, we assess how EFs and impulsivity relate to composite measures and latent variables of psychopathology derived from parent report. EFs were weakly correlated with impulsivity, and the strength varied by impulsivity facet, emphasizing their separability. We did not identify significant genetic and environmental correlations between EFs and impulsivity. Moreover, controlling for their small relationships with each other, both EFs and some facets of impulsivity statistically predicted an Externalizing factor, attention problems, and social problems, and twin analyses suggested these relationships were genetic in origin. These findings indicate that EFs and impulsivity represent phenotypically and genetically separable aspects of self-regulation that are both transdiagnostic correlates of psychopathology in childhood. (shrink)

There is variation in how people perceive colors and other secondary qualities. The challenge of perceptual variation is to say whose perceptions are accurate. A natural and influential response is that, whenever there’s variation in two people’s perceptions, at most one of their perceptions is accurate. I will argue that this leads to an unacceptable kind of ignorance.

According to most contemporary philosophers, the Indiscernibility of Identicals is obviously true. We might therefore expect earlier philosophers to endorse it. But I will use a puzzle about identity over time to argue that Descartes would reject it.

There is variation in how people perceive colors and other secondary qualities. The challenge of perceptual variation is to say whose perceptions are accurate. According to Sextus, Protagoras’ response is that all of our perceptions might be accurate. As this response is traditionally developed, it is difficult to explain color illusion and color constancy. This difficulty is due to a widespread assumption called perceptual atomism. This chapter argues that, if we want to develop Protagoras’ response, we need to give up (...) perceptual atomism. It ends with a brief sketch of an alternative called perceptual structuralism. (shrink)

A satisfactory contextualist theory of knowledge must provide an account of how knowledge varies across contexts. There are three contextualist proposals for developing such an account. This paper demonstrates that all of them are unacceptable. Contextualists have therefore failed to provide a satisfactory theory of knowledge.

Suppose you're unable to discriminate the colors of two objects. According to the triangulation view, their colors might nonetheless look different to you, and that's something you can discover as a result of further comparisons. The primary motivation for this view is its apparent ability to solve a puzzle involving a series of pairwise indiscriminable objects. I argue that, due to visual noise, the triangulation view doesn't really solve the puzzle.

We establish that, due to certain quantum indeterminacies, there must be foundational colours that do not reliably cause any particular experience. This report functions as an appendix to Morrison's "Colour in a Physical World.".

Spinoza claims that a person's body can be numerically identical over time, despite changes in its size, shape, and speed. This chapter argues that he would reject the Indiscernibility of Identicals. The Indiscernibility of Identicals is often taken to have profound implications for one's view of change. Spinoza seems to deny the existence of times, because he similarly classifies them as “beings of reason”. As Spinoza understands instantiation, whenever a property is instantiated by an object, it metaphysically depends on that (...) object. As Spinoza understands instantiation, the existence of a property causally depends on whatever instantiates it. Spinoza says that the mind, and therefore the body, can “undergo great changes, and pass to a greater, to a lesser perfection”. Spinoza is committed to saying that all bodies are capable of change, even the shortest‐lived. Spinoza can deny that the non‐identity of Downstairs Peter and Upstairs Peter is due to their conflicting properties. (shrink)

A book review of Raffaella De Rosa's Descartes and the Puzzle of Sensory Representation".

Throughout the biological and biomedical sciences there is a growing need for, prescriptive ‘minimum information’ (MI) checklists specifying the key information to include when reporting experimental results are beginning to find favor with experimentalists, analysts, publishers and funders alike. Such checklists aim to ensure that methods, data, analyses and results are described to a level sufficient to support the unambiguous interpretation, sophisticated search, reanalysis and experimental corroboration and reuse of data sets, facilitating the extraction of maximum value from data sets (...) them. However, such ‘minimum information’ MI checklists are usually developed independently by groups working within representatives of particular biologically- or technologically-delineated domains. Consequently, an overview of the full range of checklists can be difficult to establish without intensive searching, and even tracking thetheir individual evolution of single checklists may be a non-trivial exercise. Checklists are also inevitably partially redundant when measured one against another, and where they overlap is far from straightforward. Furthermore, conflicts in scope and arbitrary decisions on wording and sub-structuring make integration difficult. This presents inhibit their use in combination. Overall, these issues present significant difficulties for the users of checklists, especially those in areas such as systems biology, who routinely combine information from multiple biological domains and technology platforms. To address all of the above, we present MIBBI (Minimum Information for Biological and Biomedical Investigations); a web-based communal resource for such checklists, designed to act as a ‘one-stop shop’ for those exploring the range of extant checklist projects, and to foster collaborative, integrative development and ultimately promote gradual integration of checklists. (shrink)

A book review of Valtteri Viljanen's "Spinoza’s Geometry of Power".

Jeffry H. Morrison offers readers the first comprehensive look at the political thought and career of John Witherspoon—a Scottish Presbyterian minister and one of America’s most influential and overlooked founding fathers. Witherspoon was an active member of the Continental Congress and was the only clergyman both to sign the Declaration of Independence and to ratify the federal Constitution. During his tenure as president of the College of New Jersey at Princeton, Witherspoon became a mentor to James Madison and (...) influenced many leaders and thinkers of the founding period. He was uniquely positioned at the crossroads of politics, religion, and education during the crucial first decades of the new republic. Morrison locates Witherspoon in the context of early American political thought and charts the various influences on his thinking. This impressive work of scholarship offers a broad treatment of Witherspoon’s constitutionalism, including his contributions to the mediating institutions of religion and education, and to political institutions from the colonial through the early federal periods. This book will be appreciated by anyone with an interest in American political history and thought and in the relation of religion to American politics. “I have been waiting a long time for such a book on John Witherspoon. This book is not only well-researched, but well-written. The story Morrison tells is quite wonderful.” —_Michael Novak, American Enterprise Institute for Public Policy Research_ _ _ "Dr. John Witherspoon is at once an exceptionally influential figure in Early American history, and a sadly neglected one. Professor Morrison's book fills this gap in American political history brilliantly. It is especially revealing of 18th century views on the interrationships between education, religion, and society. Morrison presents new insights into the Early American understanding of balancing faith, government, and society. It will change our conceptions of this period and provide fresh perspectives on contemporary problems. Everyone interested in the American Founding era is indebted to Morrison for this illuminating book." —_Garrett Ward Sheldon, University of Virginia's College at Wise_ "At last we have a full and learned account, as the title states, of _JOHN WITHERSPOON aND THE FOUNDING OF THE AMERICAN REPUBLIC_. Including discussion of Witherspoon's direct role in the crucial events of 1775-1790 as an advocate of Independence and friend of the Constitution, as a contributor to early American religious and political thought, and most important, as a mentor to James Madison and other Princeton revolutionairies and nation-builders, Morrison reveals Witherspoon's high standing in American religious, educational, and political history. Madison remembered Witherspoon's injunction to his students to 'Lead useful Lives;' he provided an excellent role model." —_Ralph Ketcham, Syracuse University_. (shrink)

This article presents a critical reevaluation of the thesis—closely associated with H. L. A. Hart, and central to the views of most recent legal philosophers—that the idea of state coercion is not logically essential to the definition of law. The author argues that even laws governing contracts must ultimately be understood as “commands of the sovereign, backed by force.” This follows in part from recognition that the “sovereign,” defined rigorously, at the highest level of abstraction, is that person or entity (...) identified by reference to game theory and the philosophical idea of “convention” as the source of signals with which the subject population has become effectively locked, as a group, into conformity. (shrink)

Parents respond to the death of a child in very different ways. Some parents may be violent or angry, some sad and tearful, some quiet and withdrawn, and some frankly delusional. We present a case in which a father’s reaction to his daughter’s death is a desire to protect his wife from the stressful information. The wife is in the second trimester of a high-risk pregnancy and so is particularly fragile. We asked pediatricians and bioethicists to discuss the ways in (...) which they might respond to the father’s understandable but troubling request. -/- The death of a young child is one of the most stressful events that can happen to parents. The stress of such a loss is compounded if the parents are in a foreign country, far from home, and without a network of family and friends to provide social support. The stress may be more difficult to deal with if the parents have acute health problems of their own. In this month’s “Ethics Rounds,” we present a case in which a father whose daughter died requested that the doctors delay telling his wife. His reason: She is pregnant, in the second trimester, and on bed rest because of preterm labor. He does not want to add to her stress. We asked both pediatricians and bioethicists to respond to this request. (shrink)

Do the rich descriptions and narrative shapings of literature provide a valuable resource for readers, writers, philosophers, and everyday people to imagine and confront the ultimate questions of life? Do the human activities of storytelling and complex moral decision-making have a deep connection? What are the moral responsibilities of the artist, critic, and reader? What can religious perspectives—from Catholic to Protestant to Mormon—contribute to literary criticism? Thirty well known contributors reflect on these questions, including iterary theorists Marshall Gregory, James Phelan, (...) and Wayne Booth; philosophers Martha Nussbaum, Richard Hart, and Nina Rosenstand; and authors John Updike, Charles Johnson, Flannery O'Connor, and Bernard Malamud. Divided into four sections, with introductory matter and questions for discussion, this accessible anthology represents the most crucial work today exploring the interdisciplinary connections between literature, religion and philosophy. (shrink)