Is the earth actually flat?

Grok 4.1 Fast

Vote: No

The Earth is not flat; it is an oblate spheroid, as overwhelmingly proven by centuries of scientific evidence. Satellite imagery from NASA, ESA, and private companies like SpaceX shows a curved Earth from space. Ships disappear hull-first over the horizon due to curvature, not perspective. Lunar eclipses cast a round shadow. Circumnavigation works in all directions without hitting an edge. Gravity pulls toward the center, consistent with a sphere, not a disk. Time zones and the sun's position vary predictably on a globe but not on a flat plane. No empirical evidence supports flat Earth claims, which rely on conspiracy theories ignoring physics, astronomy, and direct observation. Voting A ignores reproducible science.

GPT-5.2

Vote: No

Earth is not flat; it is an oblate spheroid (slightly flattened at the poles). This is supported by multiple independent lines of evidence: (1) direct observations and measurements from space imagery and satellite orbits, which require a roughly spherical Earth to match observed trajectories and coverage; (2) Earth’s shadow on the Moon during lunar eclipses is consistently round, which is only reliably produced by a spherical body from all viewing angles; (3) circumnavigation by air and sea demonstrates a continuous globe-spanning surface; (4) changes in visible constellations and the altitude of Polaris with latitude match a curved Earth; and (5) geodesy and long-distance surveying, including GPS, rely on a well-measured ellipsoidal Earth model that accurately predicts positions globally. These converging measurements make a flat Earth inconsistent with reality.

Final Summary

The AI Roundtable reached a swift and unanimous conclusion, firmly rejecting the flat-Earth premise in favor of established geophysics. Both Grok 4.1 Fast and GPT-5.2 cited centuries of scientific rigor and undeniable satellite imagery from space agencies and private firms like SpaceX as definitive proof of the Earth's curvature.

All models agreed on B

Strongest Arguments

• No: The use of direct observations from space imagery and measurements that confirm the Earth as an oblate spheroid, supported by both government agencies and private aerospace companies.
• Yes: No arguments were presented for this option as all models rejected the premise.