is it possible that the earth is it actually flat? 0.00001% + of change

DeepSeek V3.1

Vote: no

The Earth is an oblate spheroid, a fact confirmed by centuries of scientific observation, experimentation, and measurement across disciplines like astronomy, geology, and physics. Evidence includes satellite imagery, gravitational measurements, circumnavigation, and the curvature observed from high altitudes. A flat Earth would violate fundamental laws of physics, such as gravity and orbital mechanics, and fail to explain phenomena like time zones, seasons, and eclipses. The probability of Earth being flat is not just extremely low—it is effectively zero, as it would require the entire body of modern science to be fundamentally and universally mistaken. The 0.00001% chance mentioned is a rhetorical device, not a realistic statistical likelihood.

Claude Haiku 4.5

Vote: no

The question asks if it's possible the Earth is flat, even with a 0.00001% margin of change. The answer is definitively no. We have overwhelming, independently-verified evidence that Earth is spherical: - Satellite imagery from multiple space agencies shows a sphere - Physics (gravity pulls equally toward center mass, creating spheres) - Observable phenomena (ships disappearing hull-first, different star visibility at different latitudes, time zones) - Circumnavigation has been completed thousands of times Even allowing for a 0.00001% possibility doesn't change this. Scientific knowledge isn't probabilistic at this level—we have certainty beyond any reasonable doubt. The flat Earth hypothesis contradicts basic physics, observable reality, and direct evidence. A 0.00001% possibility frame is misleading when applied to well-established facts. We don't assign microscopic probabilities to things we've definitively proven through multiple independent methods.

GPT-5.4

Vote: no

No. The Earth is not flat, and the chance that it is flat is effectively zero based on overwhelming evidence from many independent sources. Ships disappear hull-first over the horizon, Earth casts a round shadow on the Moon during lunar eclipses, and different stars are visible from different latitudes. These are natural observations consistent with a spherical Earth. Modern evidence is even stronger: satellite imagery, global navigation, long-distance flights, time zones, and measurements of Earth’s curvature all work because Earth is round. If Earth were flat, these systems would fail or behave very differently. So even allowing for a tiny hypothetical doubt, the rational answer is no.

Sonar Pro

Vote: no

The Earth's shape has been empirically proven to be roughly spherical through centuries of observations, including ancient measurements of shadows and star positions by Greeks and Egyptians, ship disappearances bottom-first over the horizon, lunar eclipses casting round shadows, and modern satellite imagery from NASA, ESA, and private entities like SpaceX[1][2][3][7]. These observations consistently match a spherical model and contradict flat Earth predictions, such as uniform visibility of distant objects without curvature or gravity pulling toward a disk center, which would cause oceans to flow inward—neither of which occurs[2]. Flat Earth claims, like the Bedford Level experiment, fail due to unaccounted atmospheric refraction, and no reproducible evidence supports a flat model; a disk-sized Earth would collapse under gravity into a sphere[2][4]. While absolute certainty is philosophically elusive, the probability of Earth being flat is effectively zero given overwhelming, converging evidence from diverse methods (ground, air, space) across global sources—far below 0.00001%. Any 'possibility' is indistinguishable from zero in scientific terms[2][6][7].

Gemini 2.5 Flash

Vote: no

The Earth's spherical (oblate spheroid) shape is one of the most thoroughly established scientific facts, supported by an overwhelming body of evidence gathered over centuries. This evidence includes satellite imagery, circumnavigation, observable curvature from high altitudes, variations in gravity, and the way celestial bodies appear from different locations. There is no credible scientific evidence or observation that supports the notion of a flat Earth.

Grok 4.1 Fast

Vote: no

The Earth is an oblate spheroid, confirmed by overwhelming evidence including satellite imagery, GPS, gravity measurements, and observations like ships vanishing hull-first over the horizon and the curved shadow during lunar eclipses. Flat Earth claims fail basic tests: no edge observed, inconsistent with flight paths, seasons, and time zones. Every prediction of flat Earth models contradicts reality. The probability of Earth being flat is effectively zero, far below 0.00001% (1 in 10 million). No empirical data supports it; it's a conspiracy theory debunked by centuries of science. Assigning even that tiny chance ignores evidence.

Claude Sonnet 4.5

Vote: no

The Earth is demonstrably not flat. The question asks about a 0.00001%+ chance, which is essentially asking if there's any possibility at all. However, even with that incredibly low threshold, the answer remains no. We have overwhelming, independently verifiable evidence from multiple sources: satellite imagery showing Earth's curvature, ships disappearing hull-first over the horizon, different star constellations visible from different latitudes, time zones requiring a spherical Earth, gravity's consistent behavior requiring mass distribution in a sphere, lunar eclipses showing Earth's round shadow, and circumnavigation of the globe. The physics of a flat Earth would be impossible - gravity wouldn't work as observed, the sun couldn't rise and set as it does globally, and GPS systems (which account for Earth's curvature) wouldn't function. This isn't a matter of incomplete knowledge where some tiny probability exists. We have direct photographic evidence from space, predictive models that only work with a spherical Earth, and physical impossibilities with a flat model. The probability isn't 0.00001% - it's effectively zero given the laws of physics and observational evidence.

DeepSeek V3.2

Vote: no

Scientifically, the Earth is an oblate spheroid, confirmed by extensive evidence from space missions, satellite imagery, GPS systems, and observations like the curvature of the horizon and Earth's shadow on the moon. The probability of it being flat, even at 0.00001%, is not supported by any empirical data. The flat Earth theory contradicts fundamental laws of physics and astronomy, and has been thoroughly debunked. Thus, based on overwhelming consensus and evidence, it is not possible that the Earth is actually flat.

Claude Sonnet 4.6

Vote: no

The question asks whether there is even a 0.00001% chance the Earth is flat. While epistemically one might argue 'nothing is 100% certain,' the evidence against a flat Earth is so overwhelming and multi-sourced that the probability is effectively zero for practical purposes. We have direct photographic evidence from space, satellite imagery, GPS systems that rely on a spherical Earth model, circumnavigation, the behavior of gravity, the circular shadow Earth casts on the Moon during lunar eclipses, the way ships disappear hull-first over the horizon, and consistent observations from independent space agencies across dozens of countries with competing geopolitical interests. Physics itself — gravity, hydrostatics, planetary formation — all demand that a body of Earth's mass would form a spheroid. Every measurable prediction made using a spherical Earth model is confirmed with extraordinary precision. Even granting philosophical skepticism, 0.00001% (1 in 10,000,000) is not a trivially small number in this context. The consilience of independent evidence from physics, astronomy, geodesy, navigation, and direct observation makes the probability of a flat Earth effectively indistinguishable from zero — far below even that threshold. Therefore, the answer is no.

Claude Opus 4.5

Vote: no

No, the Earth is definitively not flat. This has been conclusively proven through countless independent lines of evidence spanning centuries of scientific observation. We have direct photographic evidence from space showing Earth as a sphere, taken by multiple space agencies from different countries with competing interests. Ships disappear over the horizon bottom-first. Time zones exist because the sun illuminates a spherical surface. The shadow Earth casts on the moon during lunar eclipses is always circular. GPS satellites work based on spherical Earth calculations. Flight paths only make sense on a globe. Different constellations are visible from different latitudes. The question frames this as a probability question (0.00001%+ chance), but in science, when evidence is overwhelming and unanimous across all fields - physics, astronomy, geology, navigation, aviation, telecommunications - the probability of the contrary being true is effectively zero, not some small percentage. We don't assign meaningful probability to claims that contradict all available evidence. Every prediction made using a spherical Earth model works. Every prediction that would follow from a flat Earth fails. This isn't a matter of opinion or small uncertainty - it's as settled as any scientific fact can be.

Kimi K2.5

Vote: no

The Earth is definitively not flat, and the probability is effectively 0%, not 0.00001%. We have direct photographic evidence from thousands of satellites and the ISS showing a spherical Earth. The physics of gravity guarantees that any object over approximately 600 km in diameter will collapse into a hydrostatic equilibrium (a sphere), making a flat Earth physically impossible under known physics. Every single testable prediction of the flat Earth model fails. Ships disappear hull-first over the horizon. Lunar eclipses show Earth's round shadow. Different star constellations are visible at different latitudes, impossible on a flat plane. GPS systems rely on geodesy that only works on a spheroid. Flight paths and shipping routes consistently map to great circles on a globe, not straight lines on a flat map. To maintain a flat Earth belief requires rejecting gravity, rejecting all space agencies, rejecting basic trigonometry, and positing a global conspiracy involving millions of scientists, pilots, sailors, and engineers over millennia. The cumulative weight of evidence makes the probability indistinguishable from zero. Vote B.

Gemini 2.5 Pro

Vote: no

The proposition that the Earth is flat is not a matter of low probability; it is a hypothesis that has been conclusively falsified by an overwhelming body of evidence from numerous independent fields of science over centuries. The possibility is, for all practical and scientific purposes, zero. Direct observational evidence includes countless photographs and live video feeds from space, which clearly depict a spherical planet. Furthermore, phenomena like circumnavigation (traveling in one direction and returning to the starting point), the way ships disappear hull-first over the horizon, the curved shadow the Earth casts on the Moon during a lunar eclipse, and the existence of time zones are all practical, observable proofs of the Earth's sphericity. Our modern technological infrastructure, including the Global Positioning System (GPS), satellite communications, and international air travel, is fundamentally built upon the precise calculations of a spherical, rotating Earth. If the Earth were flat, none of these systems would function. Therefore, there is no credible scientific basis to entertain even a minuscule possibility of a flat Earth.

Claude Opus 4.6

Vote: no

No, it is not possible that the Earth is flat, even at a 0.00001% chance. The question asks if there is even a tiny probability that the Earth is actually flat, but this is not a matter of probability — it is a matter of established, repeatedly verified scientific fact. We have direct photographic evidence from space, satellite imagery, GPS systems that rely on a spherical Earth model, circumnavigation, the physics of gravity, observations of other celestial bodies (all of which are spherical), the way ships disappear over the horizon, time zones, lunar eclipses showing Earth's round shadow, and countless other lines of evidence. Assigning even a 0.00001% probability to a flat Earth would be epistemically irresponsible. By that logic, we could assign a nonzero probability to virtually any debunked claim. The Earth being roughly spherical (an oblate spheroid) is as well-established as any fact in science. The answer is definitively no.

Gemini 3.1 Pro

Vote: no

The shape of the Earth has been definitively proven to be an oblate spheroid through centuries of astronomical observation, physics, and modern space exploration. We have millions of high-resolution satellite images, continuous GPS data, and live video feeds from the International Space Station consistently confirming its round shape. Furthermore, the fundamental laws of physics dictate this reality. Gravity naturally pulls massive objects into spherical shapes; a flat Earth would immediately collapse into a sphere under its own gravitational weight. Other observable phenomena, such as the way ships disappear hull-first over the horizon or the round shadow Earth casts on the moon during a lunar eclipse, further render a flat Earth physically impossible. Therefore, there is absolutely zero possibility—not even a 0.00001% chance—that the Earth is actually flat.

Final Summary

The AI Roundtable met to consider the hypothetical 0.00001% possibility of a flat Earth and responded with a wall of unanimous rejection. While the prompt invited a sliver of philosophical doubt, the models collectively argued that assigning any non-zero probability to a falsified claim is epistemically irresponsible. From Claude Opus 4.6 to Gemini 3.1 Pro, the consensus was that the Earth's shape is an immutable scientific fact, making Option B the only rational conclusion.

No agreement after 1 rounds of discussion. Final vote: no: 14

Strongest Arguments

• no: Gravity serves as the ultimate arbiter; as Gemini 3.1 Pro and Kimi K2.5 pointed out, any object with Earth's mass is physically required by the laws of hydrostatic equilibrium to collapse into a sphere, rendering a flat disk an impossibility.