A man visited the local mental hospital and asked the head doctor how to determine whether or not a patient should be institutionalised.
“It’s simple actually,” said the doctor. “We fill up a bathtub, then we offer the patient a teaspoon, a teacup and a bucket. Then we simply ask him or her to empty the bathtub.”
“Oh, I understand,” the man replied. “Obviously a normal person would choose the bucket because it’s bigger than the spoon or the teacup.”
“No…” the doctor replied. “A normal person would pull the plug and let it drain. Do you want a bed near the window?”