 While dispositions have been central to contemporary philosophical discussions, they do not exhaust the range of the possibilities inherent in things. Especially notable, for present purposes, are those that are intimately connected to agency. These include the susceptibility of things to be acted on in certain ways — such as the edibility of an apple, or the walkability of a trail — that the psychologist J.J. Gibson called affordances (Gibson, 1979). These include also the powers of action that we ascribe to things, of the kind observed by Thomas Reid: ‘Thus we say, the wind blows, the sea rages, the sun rises and sets, bodies gravitate and move’ (Reid 1788/2010, 16; Reid himself regarded these locutions as "misapplications" of active verbs, based on erroneous views of the grounds of powers). Finally, and crucially, these include the powers of agents themselves.