Trader consensus around the overwhelming rejection of a flat Earth stems from centuries of verified scientific evidence, including satellite imagery, space exploration footage, and physics principles that consistently affirm the planet's spherical shape. Recent years have seen no meaningful shifts, with flat Earth ideas largely relegated to fringe online discourse or occasional pop culture memes in podcasts and viral videos that frame them as conspiracy entertainment rather than legitimate debate. This 99.3% market-implied probability mirrors the broad cultural and industry consensus backed by empirical data. Realistic upset scenarios would require an unprecedented global revelation or technological breakthrough contradicting all existing records, an outcome traders view as vanishingly unlikely given ongoing astronomical observations.