Markus Lammenranta

Descartes is traditionally accused of reasoning circularly in the _Meditations. Yet, it seems clear that there is no formal or logical circularity in his reasoning. There is another kind of circularity that William Alston calls epistemic circularity, and Descartes's reasoning seems to be circular in this sense. The question is whether this makes his reasoning viciously circular. It is argued that it does if we assume that his aim was to resolve the ancient Pyrrhonian problematic. Because of epistemic circularity, the problematic cannot be resolved by his project

It is a common intuition that at least in some cases disagreement has skeptical consequences: the participants are not justified in persisting in their beliefs. I will argue that the currently popular non-dialectical and individualistic accounts of justification, such as evidentialism and reliabilism, cannot explain this intuition and defend the dialectical conception of justification that can explain it. I will also argue that this sort of justification is a necessary condition of knowledge by relying on Craig's genealogy of the concept of knowledge. I will then respond to the accusation that the dialectical conception leads to radical skepticism. My response is partly concessive. It does lead to skepticism in areas where controversy prevails, such as philosophy, politics and religion, but this sort of skepticism is quite intuitive. Finally, I deal with the objection that my defense of skepticism about philosophy is self-refuting