Who Would Be the Most Challenging Speaker?

If you had the power to grant any speaker in the world, but they would have to present all of the sessions, who would you request? Selflessly for me, or who do I think would be best served for the community? Because it would be both. If we're talking about the community, I'd pick him. On a selfish point of view, it would have very little to do with teaching, but it might have quite a lot to do with education. But she's called Kate Finlayson. She home educated said children, but she's deeply involved in kind of edgy Twitter and her take on it just challenges me to be to think better. And yet everything she