The class should effectively teach you how to make that distinction in a given field/topic. If you didn't pay attention at all, you won't know what to look for or how to figure something out quickly enough to pass. Cheating would be most damaging if the actual answers were shared or similar attacks on the integrity of the test itself.

Knowing how to find or determine the current correct answers yourself is often more useful in the long run than memorizing what amounts to trivia. This is especially true when it comes to open ended and quickly changing fields...