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substitutivity. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Etymology
From substitutive + -ity.
Noun
substitutivity (uncountable)
- (philosophy) A logical relationship in which two terms can be mutually substituted without affecting the truth value of any propositions in which the terms occur, thereby establishing that the terms are identical.
1943, Willard V. Quine, “Notes on Existence and Necessity”, in The Journal of Philosophy, volume 40, number 5, page 113:One of the fundamental principles governing identity is that of substitutivity—or, as it might well be called, that of indiscernibility of identicals. It provides that, given a true statement of identity, one of its two terms may be substituted for the other in any true statement and the result will be true.
Derived terms
References
- Oxford English Dictionary, 2nd ed., 1989.