The Maniac:
Distinguishing a manic from a normal manic is quite simple. It is enough to ask: "How many human bodies, with a volume of 100 liters each, will fit in a cubic hole, with a rib length of 1 meter?"
The normal person will answer "ten" or ask for additional conditions, and the maniac will say "seven" because he knows the actual rate of filling the pit with human bodies.
_______________________
How do you know this ratio?