Nuprl Lemma : implies_functionality_wrt_iff 13,42

P1P2Q1Q2:. (P1  P2 (Q1  Q2 {(P1  Q1 (P2  Q2)} 
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Upcore 2, core 2
Definitionst  T, P  Q, P & Q, {T}, P  Q, P  Q, , x:AB(x)
Lemmasiff wf

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