simp [hF₀, hF₀.covBy_iff_wcovBy_and_ne hF₁, or_iff_not_imp_right, hne]
case inr
α : Type u_1
M : Matroid α
I F X Y F' F₀ F₁ F₂ P L H H₁ H₂ H' B C K : Set α
e f : α
hF₀ : M.Flat F₀
hF₁ : M.Flat F₁
hne : F₀ ≠ F₁
⊢ F₀ ⩿[M] F₁ ↔ (F₀ ⋖[M] F₁) ∨ F₀ = F₁
no goals