There could be an unknown non-stative verb {Doq}. If the punchline has a double meaning of “no, they are {SuD} (the color term)” vs. “no, they {SuD} (gamble, take a risk)”, it’s possible that the joke question also has a double meaning we’re unaware of. In which case the joke might not only be asking “*Are* warriors {Doq}?” but possibly also “*Do* warriors {Doq}?”.