Announcement: I’ll be in Wisconsin and Illinois on November 10-15. On the afternoon of November 11, thanks to Wisconsin’s corrupt auto dealer protection laws, we’ll be picking up my sons’ new Tesla in Buffalo Grove, Illinois. Interested in dinner nearby? Email me. And on the evening of November 13, I’m doing an all-new talk on the many faces of doom at UIUC. There might even be games before or after the talk! Interested? Again, email.
If you haven’t heard of data scientist Spencer Marlen-Starr, you should have. He’s a paragon of the intellectual deep dive. Recently, he wrote a diligent dissection of the Caplan-Jones UATX immigration debate, taking the time to speak to both me and Garett. So I decided to do a follow-up conversation with him on immigration, IQ, ancestry, and more.
At the end of our dialogue, we veer over to his recent essay on the nature of expertise. Very fun.
Here’s the whole conversation.
P.S. Shouldn’t Spencer switch to Substack? Medium seems worse in every way. If you agree, tell him in the comments.


Re expertise: all need to be careful who they are learning from.
Wow that is a deeply impressive deep dive into the debate.
I wonder if there is anyone who is up to the challenge of finding empirical evidence to resolve the hinge points that were identified.