Combining Texts

Ideas for 'The Philosophy of Logical Atomism', 'Phenomenal and Perceptual Concepts' and 'Ontology and Mathematical Truth'

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2 ideas

4. Formal Logic / F. Set Theory ST / 1. Set Theory

9967	'Impure' sets have a concrete member, while 'pure' (abstract) sets do not [Jubien]

4. Formal Logic / F. Set Theory ST / 3. Types of Set / c. Unit (Singleton) Sets

6103	Normally a class with only one member is a problem, because the class and the member are identical [Russell]