Charlie is furry. Charlie is nice. Charlie is quiet. Charlie is not rough. Dave is not furry. Dave is nice. Dave is quiet. Dave is rough. Dave is round. Dave is smart. All round people are quiet. If Charlie is furry and Charlie is smart then Charlie is rough. Green, quiet people are nice. All green, round people are not quiet. If Charlie is smart and Charlie is not rough then Charlie is nice. If Charlie is smart and Charlie is not nice then Charlie is furry. If someone is furry and not nice then they are green. If someone is furry and not nice then they are round.
Dave is not green.