This thesis develops a novel framework for explaining delusions. In Chapter 1, I introduce the two fundamental challenges posed by delusions: the evidence challenge lies in explaining the flagrant ways delusions flout evidence; and the specificity challenge lies in explaining the fact that patients’ delusions are often about a few specific themes, and patients rarely have a wide range of delusional or odd beliefs. In Chapter 2, I discuss the strengths and weaknesses of current theories of delusions, which typically appeal (...) to one or both of two factors: anomalous experience and reasoning abnormality. I argue that anomalous experience can help explain the specificity of delusions, but has difficulties in addressing the evidence challenge; reasoning abnormality can help address the evidence challenge, but has difficulties in explaining the specificity of delusions. This suggests that there may be an important factor that has not been captured by current theories of delusions. To search for this missing factor, in Chapter 3, I turn to normal believing. Inspired by the literature on Cartesian clarity and phenomenal dogmatism, I develop a dual-force framework of believing, according to which beliefs can be understood as the results of the interaction between the justificatory force and causal force of evidence and the justificatory force and causal force of clear experience, in which something clearly seems to be so to the subject. This framework suggests that the missing factor may be the clear experience with its distinctive phenomenal clarity that compels assent. In Chapter 4, I return to delusions, and argue that the dualforce framework can help us to get a better grip on some personal descriptions of delusions; make progress in addressing the evidence and specificity challenges of delusions; and shed new light on the underpinnings of delusions. In the end, I conclude with some remaining questions for future study. (shrink)

Descartes held the seemingly bizarre doctrine that the eternal truths are freely created by God. This 'Creation Doctrine' has been the subject of great misunderstandings and ridicule from philosophers and theologians from the seventeenth century to the present. ;This dissertation is a sympathetic interpretation of Descartes' Creation Doctrine. After first briefly examining some alternative views concerning the relationship between the eternal truths and God, I argue that Descartes is committed to the Creation Doctrine because of his acceptance of traditional theological (...) views concerning the nature of God, in particular, God's simplicity and freedom. I then argue that Descartes' Creation Doctrine, contrary to the claims of some recent commentators, does not entail any bizarre modal theses. For instance, the fact that God could have willed that the eternal truths are false does not entail that there are no necessary truths. I conclude by offering an interpretation of Descartes' explanation of the necessity of the eternal truths. ;We will see that the Creation Doctrine is theologically well-grounded, does not affect ordinary modal claims, and in fact, guarantees the necessity of the eternal truths. (shrink)

Throughout their life Ibn Sînâ and Descartes firmly believed that the soul or mind of a human being was essentially incorporeal. In his ‘On the Soul’ (De anima), the psychological part of his vast...

This version has been superseded by the one published in Spring, 2014.