Bob is big. Bob is blue. Bob is furry. Bob is rough. Dave is cold. Erin is cold. Fiona is rough. Cold things are round. If something is not cold then it is furry. All furry things are round. If something is not big then it is quiet. Big things are round. If something is big and not round then it is rough. If Dave is big and Dave is not round then Dave is not blue. If something is not furry and not cold then it is not big.
Bob is rough.