  Most subsequent discussions take Lewis’s analysis as a starting point, if only as a foil for motivating some alternative. Many philosophers simply help themselves to Lewis’s account without modifying it. On the other hand, virtually every element of Lewis’s account has attracted criticism during the past few decades. For instance, Ken Binmore (2008) and Richard Moore (2013) attack the “common knowledge” condition in Lewis’s analysis. In this section, we will review some prominent criticisms of Lewis’s account.