Erin is big. Erin is blue. Erin is cold. Erin is quiet. Erin is rough. Erin is round. Erin is young. If something is round then it is rough. If something is quiet and young then it is big. Round things are young. If Erin is blue and Erin is big then Erin is rough. If Erin is quiet and Erin is rough then Erin is round. All young, blue things are rough.
Erin is not rough.