Excellent conversation - Brian Green is always interesting and educational to watch! I do have a counter argument to Brian’s seeming certainty that there is no free will, though.  The problem is that the “Free Will” we are usually talking about is a feature of consciousness.  We never talk about the free will of rocks for example. You have to be conscious to make a choice.<br><br>Yet, (The Hard Problem Of) consciousness is currently a phenomenon where there are no truly satisfactory explanations.  In the spirit of Feynman, if you disagree and truly understand consciousness, go design and make one. As far as I know, no one has the slightest clue of how to do this, sooooooooo … I think being certain concerning the nature of one tiny feature (free will) of a much larger and currently very poorly understood phenomenon (consciousness) is not warranted.  It’s way too early to say “case closed: no free will”.  Who knows what new discoveries we will have to make to explain consciousness satisfactorily?  It doesn’t seem like the * types * of laws we know so far can do it.<br><br>In summary, I think the stance  should be more like “with our current knowledge of physical laws, which offer no insight about consciousness itself , we have no firm ground on which to understand one of its parts (free will)”.  We need more research into consciousness first!<br><br>Any counter-counter-arguments out there?