Bob is big. Bob is blue. Bob is furry. Dave is big. Dave is blue. Dave is cold. Dave is furry. Dave is green. Erin is furry. Erin is rough. Erin is young. Harry is big. Harry is furry. Harry is green. Harry is young. Big, furry things are blue. If Erin is young and Erin is rough then Erin is green. Big things are rough. If something is blue and big then it is cold. All cold things are rough. All rough things are green.
Bob is not rough.