 Christopher Peacocke (1999, 2002) explicitly puts forward an account of modal knowledge that appeals to understanding and tacit knowledge of certain modal principles, while it eschews the role of intuition. Peacocke tackles the Integration Challenge and, in particular, the fact that we lack a causal connection to modal facts and properties as commonly understood in the metaphysical framework of possible worlds. He believes that the best way to solve the problem is to adopt Moderate Rationalism, which