Bob is big. Bob is blue. Bob is nice. Fiona is big. Fiona is nice. Gary is kind. Harry is blue. All kind, furry things are nice. All quiet things are furry. All nice things are furry. If Fiona is nice then Fiona is blue. Blue things are quiet. If something is quiet and nice then it is rough. All blue things are quiet. All furry things are kind. If something is nice and not rough then it is furry.
Harry is not nice.