Bob is blue. Bob is furry. Bob is green. Bob is rough. Bob is white. Dave is blue. Dave is furry. Dave is green. Dave is quiet. Dave is rough. Dave is round. Dave is white. Fiona is green. Fiona is rough. Fiona is round. Fiona is white. If Fiona is white then Fiona is quiet. If something is blue then it is furry. All round, quiet things are green. Quiet things are blue. All quiet, white things are blue. If something is furry and white then it is round.
Dave is not rough.