"Why can't I pull a small wagon with a team of ducks? I can pull a large wagon with a team of horses." Useful answers: Ducks are not as intelligent as horses a

"Why can't I pull a small wagon with a team of ducks? I can pull a large wagon with a team of horses." Useful answers: Ducks are not as intelligent as horses and aren't as easy to train. There is not a good way to strap a harness onto a duck for this task. Ducks waddle and this introduces turbulence. Ducks have substantially less pulling power. etc. Useless answer: A duck is not a horse because a duck is different from a horse. The person making the analogy knows that it is an analogy; it is not the source of confusion.