Ah, but with some very simple and basic information we have, recognising the answer should be fairly easy. At least, if you make sure to talk to everybody. Basically, we know something so basic about the answer that it doesn't take fitting him/her in with everything to realise he/she is the answer. But naturally, fitting him/her in with everything is much more satisfying
Then again, I may be wrong. Llanowar says he has played through the game, but was unable to find the answer. But then again, he may have been looking for the wrong signs.
Regardless, I think you have a good chance at finding the answer, even without full knowledge of the riddle. But I think you would agree that it'd be better to only reveal the guess after we have on beforehand fitted it in with everything.