Explain SMBC — the wiki for Saturday Morning Breakfast Cereal

This comic presents a fake mathematical proof titled "A Proof That No Numbers Are Interesting."

The proof goes: Suppose there exists a set containing all interesting numbers, S. Everyone knows about S, making it non-interesting. We have a contradiction. Therefore, no numbers are interesting.

This is a parody of the well-known "interesting number paradox" in recreational mathematics. The classic version argues that ALL numbers must be interesting: if there were uninteresting numbers, the smallest uninteresting number would be interesting by virtue of being the smallest uninteresting number, creating a contradiction. Weiner flips the logic on its head -- instead of concluding that all numbers are interesting, the comic argues that if a set of interesting numbers exists and everyone knows about it, the set becomes non-interesting (because familiarity breeds contempt, essentially). The humor lies in the deliberately flawed logical leap: "everyone knows about S" does not logically entail that S becomes non-interesting, but it sounds plausible enough as a pseudo-proof to be funny. It's also a dig at how knowing something is "interesting" can strip it of its novelty.