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3 ideas
13504 | Truth for sentences is satisfaction of formulae; for sentences, either all sequences satisfy it (true) or none do [Hart,WD] |
13503 | A first-order language has an infinity of T-sentences, which cannot add up to a definition of truth [Hart,WD] |
10170 | While true-in-a-model seems relative, true-in-all-models seems not to be [Reck/Price] |