Nuprl Lemma : do-apply-pred? 11,40

es:event_system{i:l}, e:es-E(es). sqequal(do-apply(es-pred?(es); e); es-pred(ese)) 
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Definitionsevent_system{i:l}, t  T, x:AB(x), es-E(es), pred(e), es-pred(ese), do-apply(fx)
Lemmases-E wf, event system wf

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