Mark Boespflug

Descartes appears to hold that everything we believe is the product of a voluntary choice. Scholars have been reluctant to take this particularly radical version of doxastic voluntarism as Descartes’ considered position. I argue that once Descartes’ compatibilist conception of free will as well as his position on the ‘freedom of indifference’ are taken into account, the primary motivations for the rejection of the aforementioned radical version of doxastic voluntarism lose their force. Consequently, we may take Descartes at his word when he maintains that everything we believe, we believe freely – even if we cannot believe anything we wish.

John Locke has been widely understood to hold that belief is under one's direct control. This doxastic voluntarism appears to be implicit in his evidentialism, his doxastic moralism, and his postulation of an ability to suspend assent. I argue, first, that interpreting Locke as a doxastic voluntarist is untenable—at odds with his conception of knowledge, probable assent, and religious belief. I also claim that interpreting Locke as a voluntarist fails to cohere with his understanding of the intellect's relation to the will. Although Passmore's voluntarist interpretation does not capture Locke's conception of doxastic control, there is a narrow sense in which Locke allows room for direct control of belief.

This book provides a systematic treatment of Locke's theory of probable assent. It shows how the theory applies to Locke's philosophy of science, moral epistemology, and religious epistemology. There is a powerful case to be made that the most important dimension of Locke's philosophy is his theory of rational probable assent, rather than his theory of knowledge. According to Locke, we largely live our lives in the "twilight of probability" rather than in "the sunshine of certain knowledge". Locke's theory of probable assent is towering insofar as it contains a wealth of novel, independently interesting, and prescient elements that precede the modern field of formal epistemology. In this book, the author argues for the central role of probable assent in Locke's philosophy. Locke's theory of probable assent is based on an epistemic modesty that claims, roughly, that our cognitive abilities are quite limited and that we ought to carry ourselves in believing with due caution. This modesty motivates the author's discussion of other aspects of Locke's epistemology, notably his principle of proportionality, his doxastic involuntarism, his epistemological pragmatism, and his theory of testimony. The book concludes by connecting the theory of probable assent with Locke's views on the limits of science, moral epistemology, and the rationality of faith. Locke's Twilight of Probability will appeal to scholars and advanced students working on Locke and the history of early modern philosophy.

Aquinas’s conception of faith has been taken to involve believing in a way that is expressly out of keeping with the evidence. Rather than being produced by evidence, the confidence involved in faith is a product of the will’s decision. This causes Aquinas’s conception of faith to look flagrantly irrational. Herein, I offer an interpretation of Aquinas’s position on faith that has not been previously proposed. I point out that Aquinas responds to the threat of faith’s irrationality by explicitly maintaining that one may reasonably believe by faith because of an instinct to believe. I go on to point out other instances in which instincts amount to legitimate epistemic grounds for Aquinas. Given that this dimension of Aquinas’s thought is not well developed, I close by introducing some extensions of it in the work of John Henry Newman as well as points of contrast.

The common sense that heavily informs the epistemology of Thomas Reid has been recently hailed as instructive with regard to some of the most fundamental issues in epistemology by a burgeoning segment of analytic epistemologists. These admirers of Reid may be called dogmatists. I highlight three ways in which Reid's approach has been a model to be imitated in the estimation of dogmatists. First, common sense propositions are taken to be the benchmarks of epistemology inasmuch as they constitute paradigm cases of knowledge. Second, dogmatists follow Reid in taking common sense propositions to provide boundaries for philosophical theorizing. Inasmuch as philosophical theorizing leads one to deny a common sense proposition, such theorizing is stepping outside of the bounds of what it can or should do. Third, dogmatists follow Reid in focusing heavily on the problem of skepticism and by responding to it by refusing to answer the demand for a meta-justification that the skeptic wants.

Locke’s principle of proportionality – among his most important contributions to philosophy – states that we ought to apportion our assent to a given proposition in accord with the probability of that proposition on an adequate body of evidence. I argue that treatments of Locke’s principle fail to avoid interpreting it as a fundamentally doxastic prescription – a precept concerning how we ought to voluntarily control our assent. These interpretations are problematic on account of their implications concerning the degree of control that agents have over the doxastic process, and on account of how they cohere with numerous texts in the Essay. I suggest that the principle, instead, commends that we engage in certain activities, or practices, that tend to produce true beliefs.