(Forall (?Self ?Time)
(<=> (Active ?Time System-With-Condensor ?Self)
(And (System-With-Condensor ?Self)
(Active ?Time System-Model ?Self))))
(Attribute-Function-Of Cnd System-With-Condensor)
(Forall (?Self ?Time)
(<=> (Active ?Time Condensor-System ?Self)
(And (Condensor-System ?Self)
(Active ?Time System-With-Condensor ?Self))))
(Forall (?Self ?Time)
(<=> (Active ?Time Condensor-With-Heat-Transfer-System ?Self)
(And (Condensor-With-Heat-Transfer-System ?Self)
(Active ?Time System-With-Condensor ?Self))))