Casey was working on a new game, for which he had done the basic programming, but hadn't yet started on any real design. He wanted to talk about how to do game design, and this is what ensued.
At some point I referred to Frank Lantz's "Immersive Fallacy" rant, which you can find here: https://www.youtube.com/watch?v=6JzNt1bSk_U
The volume is a little wacky since Casey was quiet on the recording; I went in and hand-boosted his volume in many places, but not everywhere.