This book addresses a part of a problem. The problem is to determine the architecture of cognition, that is, the basic structures and mechanisms underlying cognitive processing. This is a multidimensional problem insofar as there appear to be many distinct types of mechanisms that interact in diverse ways during cognitive processing. Thus, we have memory, attention, learning, sensation, perception, and who knows what else, interacting to produce behavior. As a case in point, consider a bit of linguistic behavior. To tell a friend that I think Greg won a stunning victory, I must evidently rely...