simp [Inconsistent, Set.ext_iff, theory]
F : Type u_1
S : Type u_2
T : Type u_3
U : Type u_4
inst✝² : System F S
inst✝¹ : System F T
inst✝ : System F U
𝓢 : S
⊢ Inconsistent 𝓢 ↔ theory 𝓢 = Set.univ
no goals