The overwhelming scientific consensus, backed by centuries of empirical observation, satellite imagery, and space exploration data, drives the 99.3% market-implied probability on "No" for Earth being flat. Traders recognize how this outcome aligns with established physics, historical navigation records, and modern aerospace achievements that have long settled the debate in public discourse. While flat Earth ideas persist as niche memes or viral social media moments in pop culture, they lack credible traction against measurable evidence like curvature from high-altitude flights or global positioning systems. Realistic upset scenarios remain negligible absent an unprecedented, verifiable revelation contradicting all known data, though markets always price in the slim chance of unforeseen developments before resolution.