What should I ask Nate Silver?

Yes, I will be doing another Conversation with Nate, based in part on his new and forthcoming book On the Edge: The Art of Risking Everything (I have just started it, but so far it is very good, dealing with issues of poker and also risk-taking more generally).

Here is my previous Conversation with Nate Silver.  And please note I am not looking to ask him about the election.  So what should I ask?