Maybe.maybe_bind_none_sym: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/maybe.bend as Maybe
Lines 291-296 of bend-mathlib@0.8.1.0/maybe.bend: https://jend.leeeet.dev/read.txt?path=bend-mathlib@0.8.1.0/maybe.bend&start_line=291&end_line=296

import Base

# Binding a function that always fails gives None, reversed to rewrite toward the simple side.
law maybe_bind_none_sym:
  for ~A: Data
  for ~B: Data
  for m: Maybe<&2, A>
  {None{} == Maybe.bind(&2, A, B, m, x => None{}) : Maybe<&2, B>}

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe.bind
  https://jend.leeeet.dev/definition.txt?path=bend-mathlib@0.8.1.0/maybe.bend&name=maybe_bind_none