The correlation may not mean much.
If intelligent, then knowledge (Valid) If knowledge, then intelligent. (Invalid, and this is all the quiz looks for)
_____ _____ | A | | B | _____ _____|_____| _____ _____|_____| [_____|_____|_____][_____|_____|_____] /\ / \ /____\
If box A weighs 300 kg, how much does box B weigh?
The question above does require a bit of common knowledge to get you started. But it goes beyond that, while remaining simple. The simpleminded won't see it.