An Activity whose Intended-Purpose is to produce a Plan. Specifically, if an Activity is a Planning Activity, this implies that a. there is some Activity-Spec which when Executed, gave rise to the Activity; b. the Intended-Purpose of the Activity-Spec is to produce a Plan
(=> (Planning ?Planning)
(Exists (?Plan ?Aspec)
(And (Plan ?Plan)
(Activity-Spec ?Aspec)
(Execution-Of-Activity-Spec ?Aspec ?Planning)
(Intended-Purpose ?Aspec
'(Actual-Output ?Planning ?Plan)))))
(=> (Plan-Assumption ?Plan ?Assumption)
(Exists (?Planning)
(And (Planning ?Planning)
(Actual-Output ?Planning ?Plan)
(Planning-Assumption ?Planning ?Assumption))))