Bob is big. Bob is green. Bob is nice. Bob is quiet. Bob is white. Fiona is big. Fiona is green. Fiona is nice. Fiona is quiet. Fiona is rough. Fiona is smart. Fiona is white. If Fiona is white then Fiona is rough. If Fiona is nice then Fiona is rough. All white, smart things are rough. If Bob is green then Bob is rough. If something is rough and big then it is smart. All rough things are quiet.
Bob is rough.