People ask the psychiatrist at a party:
"How are you able to decide when someone is normal or not?"
"Nice and Easy! A question has to be asked that do not cause a problem to normal people."
"For example, this... Captain Cook took part in three trips around the world, and got killed on one of them. On which of his trip did it happen?"
"Hmm... I was never familiar with the history."
A psychiatrist (at a party) was asked "How do you determine if someone is normal or not?"
"Very easy!" I simply ask them a question that wouldn't baffle a normal person." (or ...a question that would be a no-brainer for a normal person).
"Like what, for example?"
"For example, If Capt. Cooke made three trips around the world and was killed on one of them, which one was it?"
"Hmmmm, let's see... I've never been good at history..."
Vadim, you're English is amazing. You express yourself beautifully and your joke wasn't incorrect. I just wanted you to have it the way a native would tell it. Hope it helps AND I hope that one day my Russian will be like your English :)
On his last trip, of course.