Charlie is quiet. Charlie is round. Charlie is smart. Charlie is white. Charlie is young. Fiona is furry. Fiona is quiet. Fiona is rough. Fiona is smart. Fiona is young. Harry is furry. Harry is quiet. Harry is rough. Harry is round. Harry is white. Quiet, young things are smart. Rough, smart things are young. If Fiona is rough and Fiona is young then Fiona is white. All white, young things are rough. If Harry is quiet then Harry is young. If something is round and white then it is quiet.
Charlie is not rough.