Logan Paul Gage

We all have an intuitive grasp of the concept of evidence. Evidence makes beliefs reasonable, justifies jury verdicts, and helps resolve our disagreements. Yet getting clear about what evidence is is surprisingly difficult. Among other possibilities, evidence might consist in physical objects like a candlestick found at the crime scene, propositions like ‘a candlestick was found at the crime scene,’ or experiences like the experience of witnessing a candlestick at the crime scene. This dissertation is a defense of the latter view. Evidence, we will argue, consists in experiences or mental states called ‘seeming states.’ We begin with a look at why the logical positivists came to abandon the experiential or “phenomenal” conception of evidence and adopted what I call “the courtroom conception.” Despite its appeal, we argue that this latter view is too objective; it has trouble playing the role of subjective reasons-provider. Being more subjective, the phenomenal conception deserves another look. However, many have thought that the phenomenal conception itself is unable to fulfill other important roles of evidence. In chapter two we dispute this, arguing that the phenomenal conception can play all four of the chief roles of evidence. Examining the religious epistemology of Alvin Plantinga in chapter three we come to see that the phenomenal conception, while attractive, is in danger of being too subjective. If the phenomenal conception of evidence is to be tenable, it must be offered in conjunction with a conservative epistemic principle which tethers together experiences with the beliefs they evidence in an epistemically appropriate manner. Hence in chapter four we consider a number of conservative epistemic principles and argue for the superiority of one in particular. But these principles have themselves been subject to criticism. For this reason, in chapter five we close by responding to a recent and pressing challenge to conservative principles in epistemology (Michael Bergmann’s dilemma for internalism) which might prevent their deployment alongside the phenomenal conception. If our arguments are correct, the phenomenal conception of evidence is still an attractive account of evidence today.

Recently, the Intelligent Design (ID) movement has challenged the claim of many in the scientific establishment that nature gives no empirical signs of having been deliberately designed. In particular, ID arguments in biology dispute the notion that neo-Darwinian evolution is the only viable scientific explanation of the origin of biological novelty, arguing that there are telltale signs of the activity of intelligence which can be recognized and studied empirically. In recent years, a number of Catholic philosophers, theologians, and scientists have expressed opposition to ID. Some of these critics claim that there is a conflict between the philosophy of St. Thomas Aquinas and that of the ID movement, and even an affinity between Aquinas’s ideas and theistic Darwinism. We consider six such criticisms and find each wanting.

Contextualism (the view that ‘knowledge’ and its variants are context-sensitive) has been supported in large part through appeal to intuitions about Keith DeRose’s Bank Cases. Recently, however, the contextualist construal of these cases has come under fire from Kent Bach and Jennifer Nagel who question whether the Bank Case subject’s confidence can remain constant in both low- and high-stakes cases. Having explained the Bank Cases and this challenge to them, I argue that DeRose has given a reasonable reply to this initial challenge. However, I proceed to argue that the current stalemate can be broken. Seeking to extend the Bach-Nagel critique, I offer a novel interpretation of the Bank Cases according to which the subject’s evidence changes between low- and high-stakes cases. If I am correct, then, given the amount of support the Bank Cases have been thought to lend contextualism, the case for contextualism is seriously weakened.