Lewis's Skeptical Hypothesis
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Lewis on skeptical hypothesis is his theory of contextualism. This means that he has a certain standard of evidence that is required for knowledge, but it depends on the context. If skeptical hypothesis has been raised, then it can’t be refuted that we can’t have knowledge. Lewis accepts premise 2, which says that if I don’t know that I’m not a brain in a vat, I don’t know that I have two hands. He also suggests the rules of ignorability, in which it determines how the context moves to either higher or lower standards. While, Dreske’s idea of skeptical hypothesis is that everyday context presupposes the falsity of error-possibilities. Dreske concludes that we should allow an agent to know P, while at the same time don’t know Q, therefore, the