simp [Clause.toList, delete_iff, negl_ne_v, v_in_c_del_l]
case intro.inr.intro.intro.h.left
n : Nat
p : PosFin n → Bool
c : DefaultClause n
l : Literal (PosFin n)
v : PosFin n
pv : p v = true
negl_ne_v : (v, true) ≠ l.negateLiteral
v_in_c_del_l : (v, true) ∈ c.toList
⊢ (v, true) ∈ Clause.toList (c.delete l.negateLiteral)
no goals