When Not to ask Questions
A man entered a train carriage and sat down. He then took out a packet of cigarettes and started to light a cigarette. Just as he was about to do so a train guard came up to him and said “You cannot smoke cigarettes on this train.”
After the train started, the man went to the area where two carriages joined and he noticed that there were nine or ten cigarette butts on the floor. Just as the man started to take out his cigarettes the train guard came up to him and said “You cannot smoke on this train.”
The man pointed out the cigarette butts on the floor and said “What about the people who smoked these cigarettes.” The train guard replied “They did not ask.”