A Rejoinder to Tyro on existence, identity, non-contradiction, and the Laws of Logic

Since Sye will need to deal with personal matters until next week, I'm going to offer a slightly different theme than the normal religious nature of my blog. In the "Peanut Gallery" thread, Tyro made a few interesting and challenging comments, and I think they're significant enough for everyone to have their own voice in the matter. Tyro's comments, and my responses, will follow in the Comments section of this post. Keep it clean, kiddos!