Hardly. It just seems a bit presumptuous to claim firm knowledge of the fundamental, low level workings of one's brain.

In general, I find these discussions often go on far too long without even bothering to define the terms. "Free will" itself seems to be an incredibly nebulous concept.

Indeed, I tend to think there is no coherent definition of free will. (Or at least, not one that leaves any doubt about whether we have it.)

Often people appeal to it as an intuitive notion, but the only notion of "will" we intuitively understand is the one we necessarily have.