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### Single Idea 21611

#### [catalogued under 5. Theory of Logic / B. Logical Consequence / 4. Semantic Consequence |=]

Full Idea

An aim of formal semantics is to define in mathematical terms a set of models such that an argument is valid if and only if it preserves truth in every model in the set, for that will provide us with a precise standard of validity.

Gist of Idea

Formal semantics defines validity as truth preserved in every model

Source

Timothy Williamson (Vagueness [1994], 5.3)

Book Reference

Williamson,Timothy: 'Vagueness' [Routledge 1996], p.149