List.internal_and_left: def of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/list.bend as List
Lines 725-730 of bend-mathlib@0.8.1.0/list.bend: https://jend.leeeet.dev/read.txt?path=bend-mathlib@0.8.1.0/list.bend&start_line=725&end_line=730

import Base
import bend-mathlib@0.8.1.0/nat.bend as MNat

def internal_and_left(a: Bool, -b: Bool, h: {Bool.and(a, b) == True{} : Bool}) -> {a == True{} : Bool}:
  match a:
    case False{}:
      Empty.absurd({False{} == True{} : Bool}, MNat.internal_false_ne_true(h))
    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-mathlib@0.8.1.0/nat.bend&name=internal_false_ne_true