Bob is strong. Bob is big. Erin is thin. Erin is tiny. Alan is clever. Fiona is poor. Fiona is bad. If someone is not huge then they are poor. If someone is not sad then they are nice. If someone is clever then they are kind. If someone is kind and not rough then they are quiet. If someone is poor and not huge then they are dull. All dull people are short. If someone is thin and tiny then they are rough. If someone is rough and not kind then they are bad. If someone is bad then they are young. If someone is nice then they are wealthy. All wealthy people are smart. All quiet people are old. 
Alan is not old.