Bob is cold. Bob is rough. Bob is not white. Bob is young. Dave is cold. Dave is not furry. Dave is not quiet. Dave is rough. Dave is smart. Dave is white. Dave is young. Erin is cold. Erin is not rough. Erin is smart. Erin is not white. Erin is young. All quiet things are young. If something is cold and quiet then it is furry. If Erin is cold then Erin is smart. If something is not cold and not quiet then it is white. All smart, young things are not quiet. If something is white and not young then it is not cold.
Dave is rough.