Full Idea
Natural necessity is neither a mere reflection of logical necessity nor a roundabout way of referring to empirical contingency.
Gist of Idea
Natural necessity is not logical necessity or empirical contingency in disguise
Source
Harré,R./Madden,E.H. (Causal Powers [1975], 1.I.B)
Book Reference
Harré,R/Madden,E.H.: 'Causal Powers: A Theory of Natural Necessity' [Blackwell 1975], p.6
A Reaction
They offer a strong defence of natural necessity, which is basic to their scientific essentialism. The key point is that they, unlike some others, are not defending metaphysical necessity about nature, but finding a different type of necessity. Good.