Bob is green. Bob is quiet. Bob is red. Bob is rough. Bob is smart. Bob is white. Bob is young. Dave is green. Dave is quiet. Dave is red. Dave is rough. Dave is white. Erin is red. Harry is quiet. Harry is red. Harry is rough. If Bob is white then Bob is quiet. All quiet things are rough. Young things are quiet. All white things are smart. If something is rough and white then it is green. Green, white things are quiet. If something is red then it is white. All smart, red things are green. If Erin is rough then Erin is red.
Erin is quiet.