PROOF.bx.rbool: def of bend-osdev-mode-core@0.1.0.0
Import: import bend-osdev-mode-core@0.1.0.0/PROOF.bend as PROOF
Lines 659-668 of bend-osdev-mode-core@0.1.0.0/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-mode-core@0.1.0.0/PROOF.bend&start_line=659&end_line=668

import Base

def bx.rbool(a: Bool, b: Bool) -> {Bool.xor(Bool.xor(a, b), b) == a : Bool}:
  match a b:
    case False{} False{}:
      {==}
    case False{} True{}:
      {==}
    case True{} False{}:
      {==}
    case True{} True{}:
      {==}

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.xor