Nuprl Lemma : existse-between1-false 0,22

es:ES, e1:E, e2:{e:E| loc(e) = loc(e1 Id }. e[e1,e2).False  False 
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DefinitionsFalse, E, e  e' , (e <loc e'), P & Q, A & B, x:AB(x), e[e1,e2).P(e), t  T, Prop, P  Q, P  Q, b, A, x:AB(x), loc(e), Id, xt(x), P  Q, ES
Lemmasevent system wf, existse-between1 wf, es-E wf, Id wf, es-loc wf, es-loc-pred, false wf

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