Logic.and_left: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/lib/logic.bend as Logic
Lines 19-24 of bend-collections-laws-crypto@1.0.0.0/proofs/lib/logic.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/lib/logic.bend&start_line=19&end_line=24

import Base

def and_left(a: Bool, b: Bool, e: {Bool.and(a, b) == True{} : Bool}) -> {a == True{} : Bool}:
  match a:
    case False{}:
      Empty.absurd({False{} == True{} : Bool}, false_true(e))
    case True{}:
      {==}

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=Empty.absurd
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/lib/logic.bend&name=false_true