Bob is blue. Bob is furry. Bob is green. Bob is nice. Bob is white. Bob is young. Erin is blue. Erin is furry. Erin is nice. Erin is rough. Erin is white. Erin is young. Fiona is furry. Gary is rough. Gary is white. If Bob is furry then Bob is rough. Furry, nice things are rough. If Fiona is rough then Fiona is furry. All rough things are nice. Green things are young. All young, white things are green. All blue, white things are nice. If something is white then it is rough.
Gary is not nice.