Sometimes there is no way to even make an educated guess. For example, when I took the Anthro exam a few weeks ago there was a question that asked something like "who studied linguistics in the Philippines?"
A. Some name
B. Some other name
C. Yet another name
D. A fourth name.
I had never seen or heard any of the names listed. It is kinda hard to make an educated guess so I just chose one and moved on.
Doug