Bob is young. Charlie is young. Erin is young. Fiona is green. If someone is not cold then they are furry. If Bob is blue and Bob is not cold then Bob is not young. If someone is furry then they are big. If Bob is big and Bob is cold then Bob is furry. If Erin is not furry then Erin is blue. If someone is blue and not big then they are young.
Erin is not blue.