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Full Idea
Described as a man it is quite contingent that he has a child, but described as a father it is conceptually necessary that he has a child. But that conceptual necessity is a reflection of the natural necessity of the father's role in reproduction.
Gist of Idea
Having a child is contingent for a 'man', necessary for a 'father'; the latter reflects a necessity of nature
Source
Harré,R./Madden,E.H. (Causal Powers [1975], 3.I)
Book Ref
Harré,R/Madden,E.H.: 'Causal Powers: A Theory of Natural Necessity' [Blackwell 1975], p.48
A Reaction
This is a (good) response to Quine's claim that necessity depends entirely on the mode of description (and his mathematician cyclist example).
Related Idea
Idea 8482 Mathematicians must be rational but not two-legged, cyclists the opposite. So a mathematical cyclist? [Quine]
18726 | For each necessity in the world there is an arbitrary rule of language [Wittgenstein] |
15233 | If natural necessity is used to include or exclude some predicate, the predicate is conceptually necessary [Harré/Madden] |
15242 | Having a child is contingent for a 'man', necessary for a 'father'; the latter reflects a necessity of nature [Harré/Madden] |
13973 | A key achievement of Kripke is showing that important modalities are not linguistic in source [Soames] |
12433 | If necessity rests on linguistic conventions, those are contingent, so there is no necessity [Hale] |
15027 | If truths are necessary 'by convention', that seems to make them contingent [Sider] |
15028 | Conventionalism doesn't seem to apply to examples of the necessary a posteriori [Sider] |
15032 | Necessary a posteriori is conventional for necessity and nonmodal for a posteriority [Sidelle, by Sider] |
15179 | To know empirical necessities, we need empirical facts, plus conventions about which are necessary [Sidelle] |
6582 | Conventions can only work if they are based on something non-conventional [Fogelin] |
14478 | Modal Conventionalism says modality is analytic, not intrinsic to the world, and linguistic [Thomasson] |