A guy walks up to a doctor and asks: "What type of questions do you ask people to decide if they are retarded or not?" " I ask questions like;
If you had to empty a bathtub that was full of water, and I gave you a teaspoon, a bucket, and a cup, how would you get the water out?" "Oh I see," the man said, "A sensible man would use the bucket because it is bigger."
"No, a sensible person would pull the plug."