Dave is furry. Dave is not green. Dave is not rough. Dave is round. Dave is smart. Dave is white. Dave is young. Erin is green. Erin is rough. Erin is round. Erin is white. Erin is young. Harry is green. Harry is rough. Harry is smart. Harry is young. If someone is rough and not young then they are not white. If Erin is not green then Erin is not smart. If someone is not smart then they are round. If someone is not rough and not green then they are furry. All green, smart people are white. If Dave is rough and Dave is green then Dave is not white. If someone is not smart then they are furry. All smart, green people are round.
Harry is round.