constructor
case inr.inl.left
A : Type
R : A → A → Prop
inhabited_A : Nonempty A
x y z : X
h✝¹ : y = X.d
h✝ : z = X.b
⊢ refl_trans_clos (fun x y => x = X.b ∧ y = X.a ∨ x = X.b ∧ y = X.c ∨ x = X.c ∧ y = X.b ∨ x = X.c ∧ y = X.d) X.d X.d
no goals