Nuprl Lemma : member-ite 0,22

b:T:Type, AB:T List, x:T. (x  if b A else B fi)  b & (x  A b & (x  B
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DefinitionsUnit, b, , Prop, x:AB(x), P  Q, P  Q, True, t  T, P  Q, (x  l), {T}, P & Q, A, P  Q, False
Lemmasfalse wf, not wf, l member wf, true wf, bool wf

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