{A : Type} `{Is1Cat A} (x y : A) `{!BinaryCoproduct x y} : A := cat_binprod (x : A^op) y.
Require Import Basics.Overture Basics.Tactics Basics.Decidable. Require Import Types.Bool. Require Import WildCat.Core WildCat.Equiv WildCat.Forall WildCat.NatTrans