Bob is blue. Bob is green. Fiona is blue. Fiona is cold. Fiona is rough. Gary is young. Harry is blue. Harry is cold. Harry is green. Harry is rough. Harry is white. Harry is young. All white things are cold. If Gary is cold and Gary is blue then Gary is rough. If Fiona is blue and Fiona is red then Fiona is white. All green things are red. If something is young then it is rough. If something is cold and not young then it is green. If something is not young and not red then it is cold. If something is not white then it is rough.
Bob is not rough.