poss:(ES{i}{i'}), R:(possible-event{i:l}(poss)possible-event{i:l}(poss){i'}),
P:(possible-event{i:l}(poss){i'}).
(e:possible-event{i:l}(poss). P(e))
 (e:possible-event{i:l}(poss). es-knows{i:l}(poss; R; P; e)) 

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Definitions	Type, , t  T, ES, x:AB(x), x:A. B(x), PossibleEvent(poss), f(a), x:A  B(x), P  Q, K(P)@e
Lemmas	possible-event wf, event system wf