Someone asked Herr Keuner if there is a God. Herr Keuner said: I advise you to think about how your behaviour would change with regard to the answer to this question. If it would not change, then we can drop the question. If it would change, then I can help you at least insofar as I can tell you: You already decided: You need a God.
If we once assume that there cannot be the unconditioned, then we're stuck. On the other hand, if we assume that there is the unconditioned, again we are going to be stuck -- we will produce an image of the unconditioned in the system of conditioning, and mistake the image for the unconditioned. Therefore, let's say that there may be the unconditioned. We leave room for that. We have to leave room in our thought for possibilities.