We know two of the three questions that Rand asked the Aelfinn when he went through the redstone doorway in Tear. This theory speculates on what Rand’s third question was.
Oneof his questions was how to cleanse saidin, to which the Aelfinn replied with a riddle that according to Herid Fel, stated
sound principles, in both high philosophy and natural philosophy.The second question was a two-parter (Knife of Dreams, News For the Dragon). Rand asked how he could win and survive the Last Battle (despite knowing the dangers of asking questions touching the Shadow) and was cryptically told “If you would live, you must die” (Lord of Chaos, Connecting Lines) to survive and “The north and east must be as one. The west and south must be as one. The two must be as one” (Knife of Dreams, News For the Dragon) to win. (For Rand’s solutions to these answers see The Aelfinn's Answers article)
- The Path of Daggers, Message From the M’Hael
Rand’s third question is unknown, as is the answer he received. However, we do know that the Aelfinn didn’t mention Rhuidean to Rand (The Shadow Rising, Rhuidean).
Let’s approach the problem from another angle.
The Aelfinn answered each of Rand’s questions cryptically so that it took him a while to figure them out. (In contrast, Mat’s answers were straightforward.) In the meantime Rand was reassured by their replies that there is a possible solution.
There is another great long-term worry of Rand’s which he also thinks could be resolved favourably:
Prophecy said he would Break the World again. The idea horrified him. Perhaps he could escape that part, at leastI think he expresses the same reassurance here that he did for his questions about winning and surviving the Last Battle and cleansing saidin while he worked out how to do so from the Aelfinn’s answers. Therefore I think the third question Rand asked the Aelfinn was how to avoid Breaking the World as he is prophesied to do.
- The Shadow Rising, He Who Comes With he Dawn