LEAN_INFORMATION
position 671:8
A : Type,
decA : decidable_eq A,
ex_of_subcount_eq_ff :
  ∀ {l₁ l₂ : list A},
    subcount l₁ l₂ = ff → (∃ (a : A), ¬list.count a l₁ ≤ list.count a l₂),
a : A,
l₁ l₂ : list A,
h : subcount (a :: l₁) l₂ = ff,
i : list.count a (a :: l₁) ≤ list.count a l₂,
this : subcount l₁ l₂ ≠ ff,
this : subcount l₁ l₂ = tt
⊢ false
END_LEAN_INFORMATION