Nuprl Lemma : eq_atom_eq_true_elim 13,42

xy:Atom. (x =a y = tt   (x = y
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Upsqequal 1, sqequal 1
Definitions, t  T, P  Q, x:AB(x), P & Q, P  Q
Lemmasbtrue wf, eq atom wf, bool wf, assert of eq atom, eqtt to assert, assert wf, iff transitivity

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