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will have unlearned

  • future perfect
    of unlearn.
    unlearn
    verb (used with object)
    to forget or lose knowledge of.

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Alas! there cometh the time when man will no longer launch the arrow of his longing beyond man—and the string of his bow will have unlearned to whizz!

From Thus Spake Zarathustra A book for all and none by Friedrich Wilhelm Nietzsche

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