/- Copyright (c) 2021 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura -/ prelude import Init.NotationExtra /- Hint for making sure `Not p` is definitionally equal to `p → False` even when `TransparencyMode.reducible` -/ unif_hint (p : Prop) where |- Not p =?= p → False