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~forall x: A |
exists x: ~A |
exists x: ~A |
~forall x: A |
~exists x: A |
forall x: ~A |
forall x: ~A |
~exists x: A |
exists x: A |
A[x <- such x: A] |
(forall y_0, y_1: (A[x <- y_0] /\ A[x <- y_1]) => y_0 = y_1) |
(forall x: A => x = such x: A) |