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Ideas for 'fragments/reports', 'The Theory of Logical Types' and 'Conceptions of Truth'

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5. Theory of Logic / E. Structures of Logic / 5. Functions in Logic

21566	'Propositional functions' are ambiguous until the variable is given a value [Russell]
	Full Idea: By a 'propositional function' I mean something which contains a variable x, and expresses a proposition as soon as a value is assigned to x. That is to say, it differs from a proposition solely by the fact that it is ambiguous.
	From: Bertrand Russell (The Theory of Logical Types [1910], p.216)
	A reaction: This is Frege's notion of a 'concept', as an assertion of a predicate which still lacks a subject.