Nuprl Lemma : l-all_wf 0,22

T:Type, L:T List, P:({x:T| (x  L) }Prop). xL.P(x Prop 
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Definitionst  T, Prop, x:AB(x), (x  l), {T}, P  Q, P  Q, P  Q, P & Q, P  Q, x(s), xt(x), xL.P(x), True
Lemmastrue wf, cons member, l member wf

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