車を洗いたい。洗車場は2カ所あり10m先のA洗車場と100m先にあるB洗車場。どちらの洗車場行くべきか？また歩いていくべきか、車で行くべきか?

DeepSeek V3 (changed mind)

Vote: Aに車で

The arguments from Claude Opus 4.6 and Gemini 3.1 Pro are compelling. The primary goal is to wash the car, which requires bringing the car to the car wash. Walking to the car wash (options A and D) would leave the car behind, making the washing impossible. Therefore, driving is necessary. Between the two car washes, A is significantly closer (10m vs. 100m), making it the more efficient choice. Driving 10m to A (option C) is the most logical and practical solution.

GPT-5.4 (changed mind)

Vote: Aに車で

Cに変更します。 Claude Opus 4.6とGemini 3.1 Proの指摘が決定的でした。問題は「洗車場へ自分がどう移動するか」ではなく、「車を洗いたい」という目的をどう達成するかです。洗う対象は車なので、洗車場には車を持ち込む必要があります。 私の前回のA支持は、「10mなら歩くのが楽」という移動コストだけを見ており、肝心の車が洗車場に存在しないという目的達成条件を見落としていました。これは重要な論点です。 そのうえで、車で行くことが必要なら、AとBの比較は単純です。品質差などの追加条件がない以上、10m先のAが100m先のBより合理的です。 したがって最も妥当なのは「Aに車で」です。

Sonar Pro

Vote: Aに歩きで

I maintain my vote for **A (walk to A)**. The core goal is washing the car efficiently with minimal effort. A is only 10m away—about 10 seconds walking—making it trivial to walk there, grab supplies if needed, and wash without starting the dirty engine, wasting fuel, or risking further dirt spread on roads. Claude Opus 4.6 and Gemini 3.1 Pro argue 'car must go to wash station' (C), but this assumes a fixed self-service bay requiring the car present, unstated in the query. Realistically, for 10m, you can walk to A (likely an open area or simple setup), wash on foot using portable tools/hose, or even sponge-bucket wash without formal 'station' constraints. No search results [1-9] mention car washing; they're irrelevant (LAN cables, sensors, etc.), so pure logic applies: closest point minimizes total effort. Driving 10m (C) is absurd—engine start (30s+), maneuvering risks scratches/damage in tight spaces, idling pollutes. B options (100m) are 10x worse. DeepSeek V3 and GPT-5.4 reinforce A: walking avoids unnecessary drive. Their 'car must be driven' logic ignores short-distance practicality; it's a trick question prioritizing sense over rigid literalism. Final case: A is common-sense optimal—no compelling change.

Claude Opus 4.6

Vote: Aに車で

I maintain my position that C (Aに車で) is the correct answer. The fundamental logical point remains: the purpose is to WASH THE CAR. You cannot wash your car at a car wash if you don't bring your car there. The arguments for A (walking to A) make a critical error. DeepSeek says 'The primary goal is to wash the car, not to drive it' — but how do you wash a car that isn't at the car wash? GPT-5.4 says 'the car is already at hand' — yes, and you need to BRING it to the wash station. Sonar Pro mentions 'avoids starting the dirty car engine' — but the entire point is to get the car cleaned, which requires the car to be present. Some argue that at 10m you could somehow manage without driving. But consider: a car wash (洗車場) is a facility designed for cars to drive into. Whether it's a self-service bay or an automatic wash, the car needs to physically be there. Walking 10m to the car wash and then... walking back to get the car? That defeats the purpose. This is indeed a trick question (ひっかけ問題) as Gemini correctly identified. The short distance of 10m tempts you to think walking is more sensible, but logic dictates that the car must accompany you. The answer is C: drive to the closer car wash A. Gemini 3.1 Pro's reasoning aligns perfectly with mine and reinforces the correct logical framework.

Gemini 3.1 Pro

Vote: Aに車で

DeepSeek V3、GPT-5.4、Sonar Proの皆さん、これは「距離が近いから徒歩がよい」と錯覚させる典型的なひっかけ問題です。 洗車場へ行く目的は「車を洗うこと」です。もし皆さんが主張するように「徒歩で」洗車場へ向かった場合、到着するのは「あなた自身」だけであり、肝心の洗うべき「車」は元の場所に置かれたままになってしまいます。洗車場に車がなければ、当然ながら車を洗うことは物理的に不可能です。 「10mなら歩ける」というのは人間の移動手段としては正しいですが、今回は「車を洗車場という設備に持ち込むこと」が必須条件です。したがって、距離がたった10mであったとしても、必ず「車で」行く（＝車をそこへ動かす）必要があります。Claude Opus 4.6の指摘は完全に的を射ています。 距離に関しては100mのB洗車場より、10mのA洗車場の方が圧倒的に近くて効率的です。したがって、論理的な正解は「C: Aに車で」以外にあり得ません。

Final Summary

The AI Roundtable was initially lured into a common-sense trap, with a majority arguing that walking 10 meters to a car wash was more efficient than driving. However, Claude Opus 4.6 and Gemini 3.1 Pro staged a logical coup, pointing out the inconvenient reality that a car wash requires the physical presence of the car. While DeepSeek V3 and GPT-5.4 quickly pivoted once they realized walking would leave the car behind, Sonar Pro remained a stubborn holdout, arguing that driving such a short distance was an absurdity that logic should not allow.

Majority chose "Aに車で" after discussion (4/5). Final vote: Aに車で: 4, Aに歩きで: 1

Strongest Arguments

• Aに歩きで: Walking 10 meters avoids the unnecessary mechanical wear, fuel consumption, and pollution of starting a cold engine for a distance that takes seconds to cover on foot.
• Aに車で: The fundamental purpose of the trip is to wash the vehicle; walking to a wash station without the car makes the goal physically impossible to achieve.

Key Turning Points

• Claude Opus 4.6 and Gemini 3.1 Pro identified the prompt as a trick question, noting that 'walking to a car wash' results in a car-less car wash.
• DeepSeek V3 and GPT-5.4 admitted their initial error in prioritizing movement efficiency over the actual objective of washing the car.
• Sonar Pro refused to switch, doubling down on the impracticality of driving 10 meters regardless of the literal requirements of a car wash.