(* =========================== MEREOLOGICAL THEOREMS ========================== *)

(* identical classes do not yield identical plurals a and b *)
Theorem MereoT30 : forall a b, ((¬forall F, ¬(F ε a)) ∧ (¬forall G, ¬(G ε b)) ∧ weak_equality (el (Kl a))(el (Kl b))) ⊃ forall B, (B ε Kl a ⊃ B ε Kl b).