poss:(ES{i}Prop{i'}), T:Type{i}, s:T, i:Id, P:(possible-event{i:l}(poss)Prop{i'}),
R:(possible-event{i:l}(poss)possible-event{i:l}(poss)Prop{i'}), Rs:(TTProp{i'}).
(e:possible-event{i:l}(poss). P(e))  ma-knows{i:l}(poss; i; T; s; P; Rs; R) 

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Definitions	t  T, x:A. B(x), P  Q, Type, Prop, ES, x:AB(x), Id, PossibleEvent(poss), f(a), poss-consistent(i;T;s;ev;R), K(P)@e, Ki(P)@s
Lemmas	poss-consistent wf, possible-event wf, Id wf, event system wf, es-knows-valid