Bob is big. Bob is furry. Bob is quiet. Bob is rough. Bob is round. Erin is big. Erin is furry. Erin is green. Erin is quiet. Erin is round. Fiona is big. Fiona is furry. Fiona is green. Fiona is quiet. Fiona is red. Fiona is rough. Rough people are round. If Fiona is red and Fiona is green then Fiona is round. If someone is round and furry then they are big. All rough people are furry. If Fiona is green then Fiona is quiet. Green people are rough.
Fiona is not big.