ProofNat.add_assoc: law of lawful-words@0.1.0.0
Import: import lawful-words@0.1.0.0/proof_nat.bend as ProofNat
Lines 232-236 of lawful-words@0.1.0.0/proof_nat.bend: https://jend.leeeet.dev/read.txt?path=lawful-words@0.1.0.0/proof_nat.bend&start_line=232&end_line=236

import Base

law add_assoc:
  for +a: Nat
  for +b: Nat
  for +c: Nat
  {Nat.add(Nat.add(a, b), c) == Nat.add(a, Nat.add(b, c)) : Nat}

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