law bit_or
import lawful-words@0.1.0.0/proof_u32.bend as ProofU32import Base
import lawful-words@0.1.0.0/defs.bend as D
1278law bit_or:
1279 for +a: U32
1280 for +b: U32
1281 for +k: Nat
1282 {D.bit(U32.or(a, b), k) == (D.bit(a, k) || D.bit(b, k)) : Bool}