Nuprl Lemma : es-causle_weakening_locl 11,40

es:event_system{i:l}, a,b:es-E(es). es-le(esab a c b 
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Definitionses-le(esee'), e c e', P  Q, es-locl(esee'), event_system{i:l}, left + right, prop{i:l}, s = t, es-E(es), P  Q, guard(T), es-causl(esee'), x:AB(x), t  T, P  Q, x:A  B(x)
Lemmases-axioms, es-causl wf, es-E wf, event system wf, es-locl wf

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