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Ideas for 'fragments/reports', 'Essence and Modality' and 'Short History of Modern Philosophy'

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5. Theory of Logic / A. Overview of Logic / 2. History of Logic
Nowadays logic is seen as the science of extensions, not intensions [Scruton]
     Full Idea: Logicians have come increasingly to realise that logic is the science not of the intension, but of the extension of terms.
     From: Roger Scruton (Short History of Modern Philosophy [1981], Ch.4)
     A reaction: I take this to be because the notion of a 'set' is basic, which is defined strictly in terms of its members. This move is probably because we can be clear about extensions, but not intensions. Tidiness is no substitute for complex truth.