Every question that can be answered must be Answered or at least engaged. Illogical thought processes must be Challenged when they arise. Wrong answers must be corrected. Correct answers must be affirmed.
—From the Erudite faction manifesto
Once again, Veronica Roth cheats a little bit by including a fictional epigraph, but it still means something. As the last book in the trilogy, Allegiant has the responsibility of answering tons of questions that have been raised by the first two books. Whether or not the book answers all your questions, and does this logically, is up to you to decide.