|Existence, philosophy, logic: the fact that there is something to which properties can be attributed. That does not mean that something has to be given immediately or can be perceived by the senses. See also ontology, properties, predicates, existence statements, realism, quantification, ascription.|
|Geach, Peter T.
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Existence / GeachVsHume / GeachVsGilson: the Hume-Brentano-Gilson thesis (that existence adds nothing conceptual) cannot be recognizably claimed if true - it treats existence as nonconceptual (not conceptualized) and tangible only in existence judgments, but this statement itself is not an existence statement and treats existence a conceptual. - Contradiction.
Logic Matters Oxford 1972