Abstract
Receptivity is a foundational concept in the analysis of causation given in Gregg Rosenberg’s A Place for Consciousness and it enters, directly or indirectly, into the definitions of a host of other terms in the book. This commentary raises a problem about how we are to understand receptivity. Search for a solution proceeds by examination of several contexts in which the concept of receptivity is used. Although a satisfactory solution remains elusive, it is hoped that making the problem clear will lead to its eventual resolution.