[Ian's jaw tightens immediately. He is not answering that, no matter how vague a question it may seem. Souji's fishing right now, and Ian's not going to give him any bait to work with.]
So far there hasn't been any indication that the information we're given upon waking is a lie. [If you're not going to ask the right questions, Souji, then Ian will just start from the top.] There also isn't a lot to say it's true, however. The greatest indication of at least some parts being accurate is that some of us have arrived after different points in time - that doesn't discount the possibility of an illusion, but it's something to consider.