Bool.eq_true_of_or_eq_false_left: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/bool.bend as Bool
Lines 506-512 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=506&end_line=512

import Base

# If a or b is true and a is false then b is true.
law eq_true_of_or_eq_false_left:
  for a: Bool
  for -b: Bool
  for h: {Bool.or(a, b) == True{} : Bool}
  for ha: {a == False{} : Bool}
  {b == True{} : 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.or
  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/bool.bend&name=internal_true_ne_false