The Sleeping Beauty Problem
Woken with no memory of having been woken before, how confident should you be that the coin came up heads?
1997 (posed), 2000 (named and popularised)24 min read
American analytic philosophy
David Lewis
1941 – 2001
One of the most influential analytic philosophers of the twentieth century, at Princeton from 1970. He is best known for modal realism, the counterfactual analysis of causation, and the Principal Principle linking chance to rational credence. His reply to Elga, published shortly before his death, is the canonical statement of the halfer position on Sleeping Beauty.