Abstract

Response-dependent (R-D) properties have a big epistemological advantage: when we are the responders, they give us real knowledge of what their bearers can do or cause. But accounts vary substantially with respect to the underlying metaphysics, and the epistemological advantage is easily lost. In this paper, I explain how this occurs in Pettit’s influential account. I begin by outlining the epistemological motivation for dealing with R-D properties, in particular for some, more demanding, empiricist theories of knowledge. I then explain how dispositional accounts of R-D properties, like Johnston’s, invite in accounts involving judgments, like Pettit’s. In Pettit’s account, responses are effectively judgments of salient similarities between objects, and thereby second-order, so that it is not the properties, but our concepts of the properties that are “response-privileging” and thereby ultimately R-D. This account is then extended to all concepts. Pettit thus gives us a R-D genealogy of concepts, but relinquishes the epistemological asset inherent in (first-order) accounts of R-D properties as consisting in (“real”) response events.