1908-2000 AD Willard van Orman Quine [WMQT]

Wikipedia link

Stanford Encyclopedia of Philosophy link

Interview by Bryan Magee

Quotes from Willard van Orman Quine:

  • Word and Object, p. 142.

    “When a singular term is used in a sentence purely to specify its object, and the sentence is true of the object, then certainly the sentence will stay true when any other singular term is substituted that designates the same object. Here we have a criterion for what may be called purely referential position: the position must be subject to substituitivity of identity.”