It's not even a debate.
A pizza controversy need not even exist in the first place-- whatever that greasy, bulletproof disc with the sauce on top ought to be called, it is certainly not pizza.
Indeed, "Chicago style" is really a cheesy gumbo held captive inside a giant damn bread bowl. Eating one of those things is like trying to eat the Walls of Jericho. Other times, it's like wading in murky water: who the hell knows what could be down there?
Here's a handy guideline: if you take a bite and end up gnashing into what basically constitutes a series of mostly-whole tomatoes floating in a cytoplasm of arbitrarily-selected meat products, then pizza is not the name of the thing you're eating.