a b c d f (g : d $-> _) : f $== twist b a c $o g -> twist a b c $o f $== g. Proof. intros p; symmetry; apply moveL_twistL; symmetry; exact p. Defined.
Require Import Basics.Overture Basics.Tactics Types.Forall WildCat.Monoidal. Require Import WildCat.Core WildCat.Bifunctor WildCat.Prod WildCat.Equiv. Require Import WildCat.NatTrans WildCat.Square WildCat.Opposite.