Full Idea
If we have no good reason to believe that a disposition is instantiated, then the disposition should play no role in our theorizing about the world.
Gist of Idea
If a disposition is never instantiated, it shouldn't be part of our theory of nature
Source
Richard Corry (Dispositional Essentialism Grounds Laws of Nature? [2010], 3)
Book Reference
-: 'Australasian Journal of Philosophy' [-], p.6
A Reaction
It is part of our theory that a substantial lump of uranium will explode, but also that a galaxy-sized lump of uranium would explode. Surely we are committed to the latter, even though it never happens?