A Relationship between an Activity and an Entity whereby the Entity is an Output produced by the Activity.
(=> (Plan-Assumption ?Plan ?Assumption)
(Exists (?Planning)
(And (Planning ?Planning)
(Actual-Output ?Planning ?Plan)
(Planning-Assumption ?Planning ?Assumption))))
(Forall (?Activity ?Output)
(=> (Actual-Output ?Activity ?Output)
(Actual-Effect ?Activity
'(Actual-Output ?Activity ?Output))))
(Forall (?Plng ?Assump)
(=> (Planning-Assumption ?Plng ?Assump)
(Exists (?Pln)
(And (Actual-Output ?Plng ?Pln)
(Plan-Assumption ?Pln ?Assump)))))