Charlie is rough. Charlie is white. Dave is kind. Erin is nice. Erin is white. Erin is young. Fiona is big. Big, white things are young. All big things are nice. If something is big and nice then it is white. Green things are big. If Erin is big then Erin is young. All big things are green. If Erin is nice then Erin is green. If something is not rough then it is green. If something is big and not nice then it is not rough.
Dave is not white.