poss:(ES{i}{i'}), R:(possible-event{i:l}(poss)possible-event{i:l}(poss){i'}).
Trans(possible-event{i:l}
Trans(possible-event(poss);_1,_2.R(_1,_2))
 (e1, e2:possible-event{i:l}(poss). poss-le{i:l}(e1; e2)  (R(e1,e2)))
 (P:(possible-event{i:l}(poss){i'}), e1, e2:possible-event{i:l}(poss).
 poss-le{i:l}(e1; e2)  es-knows{i:l}(poss; R; P; e1)  es-knows{i:l}(poss; R; P; e2)) 

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Definitions	t  T, P  Q, x:A. B(x), f(a), Trans(T;x,y.E(x;y)), Type, , ES, x:AB(x), PossibleEvent(poss), x,y. t(x;y), e1  e2, x:A  B(x), K(P)@e
Lemmas	poss-le wf, trans wf, possible-event wf, event system wf