The cat is blue. The cat is not green. The cat is not nice. The cat is round. The cat is not young. All green things are young. If something is young and not nice then it is round. Blue things are round. All blue, young things are not green. If the cat is green then the cat is not blue. If something is blue and not green then it is not young. Green, round things are blue. If the cat is not nice and the cat is not round then the cat is young.
The cat is not nice.