 In introductory classes to epistemology, we are taught to distinguish between three different kinds of knowledge. The first kind is acquaintance knowledge: we know our mothers, our friends, our pets, etc., by being acquainted with them. The second kind is knowledge of facts, propositional knowledge, or knowledge-that: this is the sort of knowledge we acquire when we learn that, say, Ithaca is in New York State or that Turin is located in Italy. It is customary to add to the list a third kind of knowledge that is supposed to be distinct both from acquaintance knowledge and from propositional knowledge. One possesses this knowledge when one can be truly described as knowing how to do something: play the piano, make a pie, walk, speak, create, build, and so on.