Dave is quiet. Erin is big. Erin is quiet. Erin is red. Erin is rough. Erin is young. Fiona is big. Fiona is quiet. Fiona is red. Fiona is smart. Quiet people are smart. Young, round people are big. Quiet people are young. If someone is big then they are young. If someone is smart and quiet then they are round. If Fiona is big and Fiona is smart then Fiona is rough. Smart people are rough. If Dave is young and Dave is smart then Dave is round.
Dave is not big.