Bool.not_not_sym: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/bool.bend as Bool
Lines 536-539 of bend-mathlib@0.8.1.0/bool.bend: https://jend.leeeet.dev/read.txt?path=bend-mathlib@0.8.1.0/bool.bend&start_line=536&end_line=539

import Base

# Negating a boolean twice gives it back, reversed to rewrite toward the simple side.
law not_not_sym:
  for b: Bool
  {b == Bool.not(Bool.not(b)) : Bool}

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  https://jend.leeeet.dev/definition.txt?path=bend-mathlib@0.8.1.0/bool.bend&name=not_not