Hmmm . . . Tough choice. I just skimmed, and I thought that Nuju Metru probably won. Alex had a couple of big flukes, and Nuju just stayed calm, debating rationally. Sounded to me like he really thought things through. I liked the mentions on both sides of Mythologies; that was a good way to bring everything into perspective.
However, I would like to point one thing out (and it may already have been mentioned, again, just skimming): The Sun is NOT a ball of fire. There is no oxygen in space, so the Sun is not fire; rather, it is a ball of gas, fueled by nuclear reactions.
~ BioGio