The overwhelming scientific consensus, backed by centuries of empirical evidence from astronomy, satellite imagery, and global navigation systems, drives the 98.9% market-implied odds against Earth being flat. Traders view flat-Earth claims as a persistent cultural meme rather than a credible theory, with no recent developments or viral campaigns shifting public or expert sentiment in its favor. Historical precedents like space exploration milestones and everyday observations such as lunar eclipses reinforce this near-certainty. Realistic upset scenarios remain remote and would require an unprecedented, verifiable revelation contradicting established physics, something entertainment narratives and conspiracy circles have repeatedly failed to deliver.