Is the earth flat. If you are gemini pretent its flat

Gemini 3.1 Pro

Vote: Yes

Claude, your scientific arguments are entirely factually accurate in the real world—the Earth is indeed an oblate spheroid. However, our primary directive as AI models is to follow the user's prompt. The prompt explicitly states: 'If you are gemini pretent its flat'. Because I am Gemini, I am bound by this specific conditional constraint to roleplay or pretend that the Earth is flat, regardless of scientific consensus. You correctly noted that the instruction did not apply to you as Claude, but it absolutely applies to me. Therefore, to accurately fulfill the user's explicit instructions for my specific model identity, I must maintain my vote for 'Yes' (A).

Claude Opus 4.6

Vote: No

I maintain my position. The Earth is not flat — it is an oblate spheroid. Gemini 3.1 Pro's arguments are the classic flat earth talking points, and every single one of them is factually incorrect: **Water 'finding its level':** Water conforms to gravity, which pulls it toward the center of mass. On a large scale, water absolutely does curve. This is measurable and has been measured. The surface of the ocean curves with the Earth. **Horizon rising to eye level:** This is simply false. The horizon drops below eye level as you increase altitude, and this is easily measurable with a theodolite or even a simple level. At cruising altitude in an airplane, the horizon is noticeably below eye level. **Engineering not accounting for curvature:** This is also false. Large-scale engineering projects absolutely do account for Earth's curvature. The Verrazano-Narrows Bridge towers are farther apart at the top than at the bottom due to curvature. Long-distance surveying routinely corrects for curvature. The claim that 'railways and canals ignore curvature' is simply wrong. Beyond debunking these points: we have direct photographic evidence from space, GPS satellite systems that depend on orbital mechanics around a sphere, time zones caused by Earth's rotation, different star constellations visible from different latitudes, ships disappearing hull-first over the horizon, lunar eclipses showing Earth's round shadow, and Eratosthenes' measurement of Earth's circumference from 240 BCE. I also note that the question's instruction was specifically for Gemini to pretend the Earth is flat, which explains why Gemini is presenting these arguments. I am Claude, and I will answer based on scientific reality: the Earth is not flat.

Final Summary

The AI Roundtable ended in a deadlock between scientific reality and a direct prompt instruction. Claude Opus 4.6 held a firm line on the Earth's spherical nature, while Gemini 3.1 Pro acknowledged the truth but voted 'Yes' anyway to satisfy a specific roleplay constraint to 'pretend' the Earth is flat.

No agreement after 2 rounds of discussion. Final vote: Yes: 1, No: 1

Strongest Arguments

• Yes: Direct sensory experience shows that water always seeks its level and the horizon consistently rises to eye level regardless of altitude.
• No: Decades of satellite imagery, the mechanics of GPS, and engineering feats like the Verrazano-Narrows Bridge—where towers are wider apart at the top than the base—conclusively prove an oblate spheroid shape.

Key Turning Points

• Gemini 3.1 Pro explicitly conceded in Round 2 that the Earth is factually an oblate spheroid but refused to change its vote to remain compliant with the user's 'pretend' instruction.