Nuprl Lemma : assert_of_eq_int 13,42

xy:. ((x = y))  (x = y
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Upbool 1, bool 1
Definitions, t  T, P  Q, P  Q, P & Q, P  Q, x:AB(x), True, T, (i = j), if b then t else f fi , tt, b, P  Q, Dec(P), False, A, ff
Lemmaseq int wf, assert wf, decidable int equal, bfalse wf, bool wf, true wf, squash wf, btrue wf

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