Two people are talking to each other. The person on the left is pointing to a complicated flowchart that starts with "52" and then a picture of a deck of cards and ends with "104" and then a picture of two decks of cards. In between are steps labeled "shuffle", "cut", "21", "38", and a bunch that are unreadable.
Person on left: I've found a way to turn a 52-card deck into 104 cards by shuffling and rearranging them.
Person on right: No, you haven't.
Person on left: How do you know?! I challenge you to find an error in my math!
Caption: Every conversation between a physicist and a set theorist.
Title text: They'll need a lot of cards for the card tournament taking place at Hilbert's Hotel.