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Ideas for 'Metaphysics', 'Thinking About Logic' and 'The Metaontology of Abstraction'

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4. Formal Logic / F. Set Theory ST / 5. Conceptions of Set / c. Logical sets

11020	Realisms like the full Comprehension Principle, that all good concepts determine sets [Read]
	Full Idea: Hard-headed realism tends to embrace the full Comprehension Principle, that every well-defined concept determines a set.
	From: Stephen Read (Thinking About Logic [1995], Ch.8)
	A reaction: This sort of thing gets you into trouble with Russell's paradox (though that is presumably meant to be excluded somehow by 'well-defined'). There are lots of diluted Comprehension Principles.