Q: Why is the sky blue? A: Because so and so. Q: Well, why is so and so? A: Because this and that. Q: Well why is... ... Philosophically, is it possible to end up with something like this? Q: (last question) A: Because the sky is blue Can you make the full loop? Can you satisfy my last question using my first question? Also, "You" argue why the constants of nature are so finely tuned as if they give way to some sort of intelligent designer. I don't think anything of them. It just so happens they were tuned to allow for your existence, and therefore allowing you to ask the question "why are they so finely tuned?". If they were tuned any other way, then you wouldn't exist, and therefore you wouldn't have been able to address the question in the first place! Why should anyone's existence have anything to do with the universe existing? It would seem logical that a person's existence or life in general for that matter is irrelevant to whether or not the (materialistic) universe exists, but I'm having a tough time separating the two.