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|Ontological Commitment||I 236f
Properties/attributes/existence/"there are"/quantification/2nd order logic/Schiffer: (Quine 1966, p 164 (German)): even in Quine: e.g. "Is valid" is a verb that can be added to the name of a sentence, and an attribute of the named sentence. - Schiffer: no one would say that Quine thus enters into an ontological commitment - solution: it is understood as substitutional quantification.
Remnants of Meaning Cambridge 1987