F64light.dm2: def of bend-collections-laws-math@1.0.0.0
Import: import bend-collections-laws-math@1.0.0.0/proofs/math/typed/f64light.bend as F64light
Lines 55-64 of bend-collections-laws-math@1.0.0.0/proofs/math/typed/f64light.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-math@1.0.0.0/proofs/math/typed/f64light.bend&start_line=55&end_line=64

import Base

def dm2(+l: Bool, +r: Bool) -> {Bool.or(Bool.not(r), Bool.not(l)) == Bool.not(Bool.and(l, r)) : Bool}:
  match l r:
    case True{} True{}:
      {==}
    case True{} False{}:
      {==}
    case False{} True{}:
      {==}
    case False{} False{}:
      {==}

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.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.or