Craige Roberts "Know-how: a compositional approach" Jason Stanley & Timothy Williamson (2001) argue that knowledge-how, like knowledge-that, is propositional. But I argue that knowledge-how is richer: It involves self-ascription, and hence is not reducible to propositional knowledge. The argument is founded on a systematic compositional semantic analysis of the constructions and lexical items involved, an analysis whose parts can all be independently motivated. The proposed analysis is based in turn on unpublished work on infinitival questions by David Dowty & Pauline Jacobson (1991) and work on infinitival VPs by Paul Portner (1997).