Barry teaches at Vassar and hosts a documentary-style philosophy podcast called Hi-Phi Nation, and his most recent season had a four-episode run on David Lewis, America’s foremost philosopher of possible worlds (also covered by PEL), after Dr. Strange, of course.

So we talk about that notion, in the philosophy of metaphysics and language, and also in the literal physics sense that Hollywood has so much fun with lately. And WE have fun with it in a couple of variations on a classic diner scene. Cheese salad, anyone?

Image by Batiste, apparently, from paintingvalley.com. Audio editing by Tyler Hislop.

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