fact: Definition equiv_path_pullback_hset {A B C} `{IsHSet A} (f : B -> A) (g : C -> A) (x y : Pullback f g) : (x.1 = y.1) * (x.2.1 = y.2.1) <~> (x = y).
imports: HoTT.Basics HoTT.Types HFiber PathAny Cubical.PathSquare Diagrams.CommutativeSquares