Erin is cold. Erin is green. Erin is quiet. Erin is round. Fiona is quiet. Fiona is round. Fiona is white. If something is white then it is rough. If Erin is round and Erin is white then Erin is green. Young things are cold. All cold things are quiet. All rough things are white. All round, quiet things are rough. If something is rough and not cold then it is white. If something is round and not green then it is not cold.
Fiona is not rough.