Obvious facts Memes

The graph perfectly captures the mathematician's eternal suffering. Something so visually obvious—that a circle has an inside and outside—requires the mathematical equivalent of climbing Everest barefoot to prove formally. Jordan's Curve Theorem: the mathematical community's way of saying "we need 30 pages of dense topology to confirm what a 5-year-old already knows." The next time someone tells you math is straightforward, show them this and watch their soul leave their body.