A man went to a party and drank some of the punch. Late for another appointment, he then left early. Everyone else at the party who drank the punch subsequently died of poisoning.
Why did the man not die?
(In reply to
Possibility by Alan)
a similar one is what I have provided...........assuming that the man himself is a doctor and the poison was not that strong enough to react so quickly..........so the man who in fact was assumed to be a doctor managed to escape death.........