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Ideas for 'Confessions of a Philosopher', '67: Platonic Questions' and 'Nominalism and Substitutional Quantifiers'

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2 ideas

9. Objects / A. Existence of Objects / 3. Objects in Thought

10796	If objects are thoughts, aren't we back to psychologism? [Marcus (Barcan)]
	Full Idea: If objects are thoughts, aren't we back to psychologism?
	From: Ruth Barcan Marcus (Nominalism and Substitutional Quantifiers [1978], p.166)
	A reaction: Personally I don't think that would be the end of the world, but Fregeans go into paroxyms at the mention of 'psychology', because they fear that it destroys objectivity. That may be because they haven't understood thought properly.

9. Objects / F. Identity among Objects / 2. Defining Identity

10797	Substitutivity won't fix identity, because expressions may be substitutable, but not refer at all [Marcus (Barcan)]
	Full Idea: Substitutivity 'salve veritate' cannot define identity since two expressions may be everywhere intersubstitutable and not refer at all.
	From: Ruth Barcan Marcus (Nominalism and Substitutional Quantifiers [1978], p.167)