Charlie is green. Charlie is young. Dave is not furry. Dave is green. Dave is round. Fiona is rough. Fiona is white. If Dave is white and Dave is round then Dave is green. Furry people are green. All green people are round. All cold, young people are not white. If Fiona is rough and Fiona is not young then Fiona is furry. If someone is young and not furry then they are cold.
Charlie is rough.