Nuprl Lemma : es-dt_wf 11,40

l:IdLnk, da:fpf(Knd; k.Type). es-dt(lda fpf(Id; tg.Type) 
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DefinitionsKnd, t  T, isl(x), , if b then t else f fi , x:AB(x), b, rcv(l,tg), P  Q, , Unit, tag(k), lnk(k), eq_lnk(ab), isrcv(k), xt(x), compose-fpf(abf), fpf(Aa.B(a)), es-dt(lda), IdLnk, Id, ff, A, b, prop{i:l}, P  Q, P  Q, False, True
Lemmasnot functionality wrt iff, assert-eq-lnk, true wf, false wf, eqtt to assert, iff transitivity, eqff to assert, assert of bnot, bool wf, bnot wf, not wf, bfalse wf, fpf wf, IdLnk wf, compose-fpf wf, isrcv wf, ifthenelse wf, eq lnk wf, lnk wf, tagof wf, unit wf, it wf, rcv wf, Id wf, assert wf, Knd wf

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