Full Idea
It seems reasonable to assume that there are some dispositions of some things of which we are not aware because we have not yet discovered the way to get these dispositions to manifest.
Gist of Idea
Some dispositions are so far unknown, until we learn how to manifest them
Source
Stephen Mumford (Dispositions [1998], 03.7)
Book Reference
Mumford,Stephen: 'Dispositions' [OUP 1998], p.56
A Reaction
This strikes me as a pretty good description of what scientists are currently doing when, for example, they build a new particle accelerator.