Don Levi and I disagree about how we should understand the nature of reason and argumentation

I'd like to again try to set down the main points of what I take to be the central argument. I want to set out those points and then elaborate a bit on some of them.

First of all, in trying to set down these points, it seems I must explain exactly what I mean by "central."  What do I mean by the central argument?

I mean that in philosophy there are arguments that pertain to the most all-pervasive and deepest issues. Those problems are more or less central to the concerns of philosophy.