Full Idea
Dispositions can regain the metaphysical role traditionally ascribed to real powers: the that-in-virtue-of-which-something-will-G, if F.
Gist of Idea
Maybe dispositions can replace powers in metaphysics, as what induces property change
Source
Stephen Mumford (Dispositions [1998], 06.9)
Book Reference
Mumford,Stephen: 'Dispositions' [OUP 1998], p.141
A Reaction
The attraction is that dispositions can be specified a little more clearly (especially in Mumford's functional version) whereas there may be no more to say about a power once it has been located and named.