Combining Texts

All the ideas for 'Are Persons Bodies?', 'Ways Worlds Could Be' and 'Letters to Leibniz'

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4 ideas

4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula

16519	No one can conceive of a possible substance, apart from those which God has created [Arnauld]
	Full Idea: I am much mistaken if there is anyone who dares to say that he can conceive of a purely possible substance, …for although one talks so much of them, one never conceives them except according to the notion of those which God has created.
	From: Antoine Arnauld (Letters to Leibniz [1686], 1686.05.13), quoted by David Wiggins - Sameness and Substance 4.2
	A reaction: This idea cashes out in the 'necessitism' of Tim Williamson, and views on the Barcan formulae in modal logic.

10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / a. Nature of possible worlds

15432	Structural universals might serve as possible worlds [Forrest, by Lewis]
	Full Idea: Forrest proposed that structural universals should serve as ersatz possible worlds.
	From: report of Peter Forrest (Ways Worlds Could Be [1986]) by David Lewis - Against Structural Universals 'Intro'
	A reaction: I prefer powers to property universals. Perhaps a possible world is a maximal set of co-existing dispositions?

16. Persons / A. Concept of a Person / 1. Existence of Persons

3238	'Dead person' isn't a contradiction, so 'person' is somewhat vague [Williams,B]
	Full Idea: If we say (in opposition to a physical view of identity) that when Jones dies 'Jones ceases to exist' but 'Jones' body does not cease to exist', this shouldn't be pressed too hard, because it would make 'dead person' a contradiction.
	From: Bernard Williams (Are Persons Bodies? [1970], p.74)
	A reaction: A good point, which nicely challenges the distinction between a 'human' and a 'person', but the problem case is much more the one where Jones gets advanced Alzheimer's, rather than dies. A dead body ceases as a mechanism, as well as as a personality.

3239	You can only really love a person as a token, not as a type [Williams,B]
	Full Idea: If you love a person as a type instead of as a token (i.e. a "person", instead of a physical body) you might prefer a run-down copy of them to no person at all, but at this point our idea of loving a person begins to crack.
	From: Bernard Williams (Are Persons Bodies? [1970], p.81)
	A reaction: Very persuasive. If you love a person you can cope with them getting old. If you own an original watercolour, you can accept that it fades, but you would replace a reproduction of it if that faded. But what, then, is it that you love?