"indiscernibility of identicals" meaning in All languages combined

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          "ref": "1943, Willard V. Quine, “Notes on Existence and Necessity”, in The Journal of Philosophy, volume 40, number 5, page 113:",
          "text": "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.",
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          "ref": "2004, Peter Alward, “The Spoken Work”, in The Journal of Aesthetics and Art Criticism, volume 62, number 4, page 335:",
          "text": "For example, Levinson claims that a Stamitz symphony containing a \"Manheim rocket\"—a novel device in Stamitz's day—is an exciting musical work, but a work written today with the same sound structure would be funny rather than exciting. Since the Stamitz symphony and the (hypothetical) contemporary sound-identical work differ in properties, it follows from the indiscernibility of identicals that they are distinct musical works.",
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        "The principle that if two objects are absolutely identical then they must be indistinguishable from one another with respect to all of their properties."
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        "(philosophy) The principle that if two objects are absolutely identical then they must be indistinguishable from one another with respect to all of their properties."
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          "word": "identity of indiscernibles"
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          "word": "principle of substitutivity"
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