Some weak points of Lewis’ theory of knowledge ascriptions

This paper explores and criticizes some aspects of David Lewis? theory of knowledge ascriptions. In section one I present the sceptical paradox and the basic assumptions of epistemic contextualism. In section two I explain how Lewis combines the relevant alternatives theory with epistemic contextualism in formulating his theory of knowledge ascriptions. In section three I show that this theory allows knowledge which is based purely on ignoring and I argue that this unfavourable consequence stems from the way in which Lewis formulated the rule of belief within his theory. In the concluding section I point out the problematic aspects and ad hoc character of Lewis? rule of attention and claim that it was thus formulated so as to be able to solve the sceptical paradox. Finally, I claim that Lewis? theory of knowledge ascriptions is untenable in its original form.