Tononi gives a very interesting (weird?) reply: Why Scott should stare at a blank wall and reconsider (or, the conscious grid), where he accepts the very unintuitive conclusion that an empty square grid is conscious according to his theory. (Scott's phrasing: "[Tononi] doesn’t “bite the bullet” so much as devour a bullet hoagie with mustard.") Here is Scott's reply to the reply:

Giulio Tononi and Me: A Phi-nal Exchange