Combining Texts

Ideas for 'Function and Concept', 'The Theory of Logical Types' and 'Reply to Sixth Objections'

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2 ideas

7. Existence / A. Nature of Existence / 6. Criterion for Existence

18899	Frege takes the existence of horses to be part of their concept [Frege, by Sommers]
	Full Idea: Frege regarded the existence of horses as a property of the concept 'horse'.
	From: report of Gottlob Frege (Function and Concept [1891]) by Fred Sommers - Intellectual Autobiography 'Realism'

7. Existence / C. Structure of Existence / 5. Supervenience / c. Significance of supervenience

3644	Two things being joined together doesn't prove they are the same [Descartes]
	Full Idea: The fact that we often see two things joined together does not license the inference that they are one and the same.
	From: René Descartes (Reply to Sixth Objections [1641], 444)
	A reaction: Correct. The problem comes when they are never ever apart, and you begin to suspect that they are conjoined in all possible worlds. Why might this be so? It can only be identity or a causal link.