simp at this
ν : Type u_1
inst✝ : DecidableEq ν
v1 v2 : ν
h : ∀ (τ : PropAssignment ν), τ ⊨ var v1 ↔ τ ⊨ (var v2)ᶜ
this :
  (fun v => decide (v = v1) || decide (v = v2)) ⊨ var v1 ↔ (fun v => decide (v = v1) || decide (v = v2)) ⊨ (var v2)ᶜ
⊢ False
no goals