PROOF.or_comm: def of bendtorch@1.3.0.0
Import: import bendtorch@1.3.0.0/PROOF.bend as PROOF
Lines 881-891 of bendtorch@1.3.0.0/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bendtorch@1.3.0.0/PROOF.bend&start_line=881&end_line=891

import Base

# a || b == b || a, and a && b == b && a: every case computes
def or_comm(+a: Bool, +b: Bool) -> {Bool.or(a, b) == Bool.or(b, a) : Bool}:
  match a b:
    case True{} True{}:
      {==}
    case True{} False{}:
      {==}
    case False{} True{}:
      {==}
    case False{} False{}:
      {==}

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.or