Full Idea
Whatever reduces the field of the possible is a step towards necessity.
Gist of Idea
What reduces the field of the possible is a step towards necessity
Source
Harré,R./Madden,E.H. (Causal Powers [1975], 7.IV)
Book Reference
Harré,R/Madden,E.H.: 'Causal Powers: A Theory of Natural Necessity' [Blackwell 1975], p.131
A Reaction
This is a deeply stirring idea, because it suddenly opens up a research project of narrowing the possibilities, with a stunning Holy Grail at the end of it. Sherlock Holmes said this first, of course.