Sheldon and Amy were still reeling after their theory was disproved, and everyone around them knew it. To protect their fragile tempers, the group started building an absurd list of forbidden topics: symmetry, asymmetry, SimCity, the Simpsons, Simba, even “Russia” in almost any form. The rule was simple—say the wrong thing, and you might accidentally trigger memories of failed science, lost prizes, or wounded pride.