This is the clear winner. A question and an answer both hidden in the game through a variety of obscure clues hidden in plain sight. This one suggests the answer, which suggests the question to which you should seek the answer. 42. Hitch Hiker's Guide to the Galaxy fans will know that 42 is the answer to Life, the Universe and Everything. Long story short, after no-one figured it out after two years, RedLynx took pity on everyone and gave us the solution: The answer to the question was 'to question'. You know... stuff.
Oh, and one of the supposed clues, the wooly mammoth, wasn't meant to be in the game, it was left in as a mistake. See the full explanation on YouTube if you're in need of a good 'WTF?!' moment in your day.