Full Idea
Some powerful particulars require to be stimulated before their powers are manifested. Others will manifest their powers whenever the impediments to action, the constraints, are removed.
Gist of Idea
Some powers need a stimulus, but others are just released
Source
Harré,R./Madden,E.H. (Causal Powers [1975], 6.V)
Book Reference
Harré,R/Madden,E.H.: 'Causal Powers: A Theory of Natural Necessity' [Blackwell 1975], p.113
A Reaction
Sounds nice and clear, but if gunpowder explodes at a certain temperature, how can you distinguish temperatures as the 'stimulus' ones and the 'release' ones? We just remove the constraint of low temperature.
Related Idea
Idea 15276 Some powers need a stimulus, but others are just released [Harré/Madden]