In order to scientifically examine medium severity cases
it is sometimes easy to examine the extreme.
The cat owner brings the cat to a cat psychologist
once a week for a visit.
Next door he also brings his wife to see her shrink.
For the next hour he goes to do some shopping and later
he picks them both up and brings them back home healthier.
The cat psychiatrist makes a house call.
He sees the cat going totally crazy every time the owner
picks the cat up by the tail, spins it around,
and slams it against the wall.
Seeing this extreme craziness of the cat,
the psychiatrist decides it is time to put
him away,
in a place safer for the rest of society.