You want to work out, beforehand, who knows what about canoes and racing.

If you ask “you know your way around a canoe race, right?” and the person you’re facing says, “Yes, my brother and I raced frequently in Summer Camp. It was great”, then you have some information.

But you don’t have all the information you need. Perhaps the questions “Did you ever win a race?”, or “How young were you at the time?” or “Why is your life jacket on backward and inside out?” should have been asked, just for clarification.