Thematic
Free logics, philosophical issues in
The expression ‘free logic’ is a contraction of the more cumbersome ‘logic free of existence assumptions with respect to both its general terms (predicates) and its singular terms’. ...
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Thematic
Free logics
We often need to reason about things that do not – or may not – exist. We might, for example, want to prove that there is no highest ...
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Overview
Logic, philosophy of
Philosophy of logic can be roughly characterized as those philosophical topics which have emerged either from the technical development of symbolic (mathematical) logic, or from the motivations that ...
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Predicate calculus
The predicate calculus is the dominant system of modern logic, having displaced the traditional Aristotelian syllogistic logic that had been the previous paradigm. Like Aristotle’s, it is a ...
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Ontological commitment
A person may believe in the existence of God, or numbers or ghosts. Such beliefs may be asserted, perhaps in a theory. Assertions of the existence of specific ...
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Descriptions
‘Definite descriptions’ are noun phrases of the form ‘the’ + noun complex (for example, ‘the finest Greek poet’, ‘the cube of five’) or of the form possessive + ...
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