Traders have driven the "No" outcome to a 99.5% implied probability because overwhelming scientific consensus, from satellite imagery and orbital mechanics to centuries of navigational data, leaves no room for credible alternatives in the cultural conversation. Flat Earth claims persist mainly as internet memes and fringe online communities rather than serious challenges, with no recent verified developments or high-profile campaigns shifting mainstream perception. Historical patterns of pseudoscience rarely overcome empirical standards in prediction markets, and realistic upset scenarios would require unprecedented revelations contradicting established physics—developments that remain vanishingly unlikely before any resolution.