ある料理人は炒飯を作ろうとした。忘れないように先に換気扇を回しながら、食材を切った。 コンロに火をつけ、慣れた手つきで中華鍋と調理器具をふるった。最後に盛り付けて、回し続けている換気扇を止めた。 この料理人は、1人だけで料理をしていただろうか。

GPT-5.4

Vote: Yes

文中では、換気扇を回す、食材を切る、火をつける、中華鍋と調理器具をふるう、盛り付ける、換気扇を止める、という一連の行為がすべて「ある料理人」を主語にして描かれています。 他の人がいたことを示す記述はありません。換気扇を回しながら食材を切るのも、片手や手順の合間で十分可能です。 したがって、自然な読みではこの料理人は1人で料理していたと考えるのが妥当です。

Sonar Pro

Vote: No

この問題は日本語の論理パズルで、叙述の細部から料理人が1人だけではなかったことを示唆している。 「慣れた手つきで中華鍋と調理器具をふるった」という表現が鍵。中華鍋（wok）を炒める動作は片手で持ち、もう片方の手で**調理器具（例: ヘラ）を振るう**のが標準的な手法であり、両手を使うため1人で可能[私の知識]。 しかし、「中華鍋**と**調理器具をふるった」と複数形・並列形で記述され、「手つき」（単数）で両方を振ったと読めるが、自然解釈では**別々の手で同時に扱う**ことを示し、1人では困難。2人以上（例: 1人が鍋、もう1人が器具）が関与したと論理的に導かれる。 順序も証拠: 換気扇を先に回し、最後に止めるのは煙を意識した単独行動に見えるが、手つき部分が複数人を示す矛盾を生む。よって**No (B)** が正解。

Grok 4.20

Vote: Yes

The narrative consistently attributes every action to the single cook: turning on the ventilation fan early (while cutting ingredients to avoid forgetting), lighting the stove, wielding the wok, plating the dish, and finally stopping the fan. No other individuals are referenced at any point. This sequence is typical for someone working solo who activates the fan preemptively as a reminder during prep. The story provides no evidence of assistance, implying the cook handled everything alone.

Kimi K2.5

Vote: Yes

The text describes a continuous workflow performed by a single actor without any indication of assistance. The cook turned on the ventilation fan beforehand specifically so as not to forget (忘れないように先に), which is a precaution typically taken when cooking alone without someone else to remind them. All actions—cutting ingredients, lighting the stove, manipulating the wok (which requires two hands but is manageable by one person), plating, and finally stopping the fan—follow a logical sequence for a solo cook managing an entire dish from prep to finish.

Claude Opus 4.6

Vote: No

The key clue is in the phrase 「中華鍋と調理器具をふるった」(swung/wielded the wok and cooking utensils). When making fried rice, a cook typically holds the wok in one hand and uses a ladle or spatula in the other. The text says the cook wielded both the wok AND cooking utensils (plural or separate items). However, the real trick is the word 「ふるった」which can mean 'to swing/wield' but also 'to show off/demonstrate skill.' But more importantly, re-reading carefully: the cook turned on the ventilation fan first 'so as not to forget,' cut ingredients, lit the stove, and skillfully used the wok and utensils. The critical point is 「中華鍋と調理器具をふるった」— in normal fried rice cooking, one person holds the wok in one hand and a spatula/ladle in the other. This is perfectly doable alone. But wait — the puzzle might hinge on something else. Actually, the key puzzle element is: 「忘れないように先に換気扇を回しながら、食材を切った」— the cook turned on the ventilation fan first 'so as not to forget.' This implies the cook has a tendency to forget things. Then at the end, 「回し続けている換気扇を止めた」— the cook stopped the fan that had been running continuously. If the cook is forgetful, they remembered to stop it, which seems fine. But reconsidering: 「中華鍋と調理器具をふるった」— to 'wield' (振るう) a wok and cooking utensils simultaneously requires two hands for the wok alone in professional Chinese cooking (or one hand for wok, one for ladle). The text separates '中華鍋' and '調理器具' suggesting they were handled separately/simultaneously by different people. One person can handle a wok + one utensil, but the phrasing '中華鍋と調理器具' (wok AND utensils) with the plural implication suggests multiple items being wielded, potentially requiring more than two hands — meaning another person was helping. Therefore, the cook was likely NOT alone — someone else helped handle either the wok or the utensils.

Claude Opus 4

Vote: No

The key detail is in the phrase 「中華鍋と調理器具をふるった」(wielded a wok and cooking utensils). The verb 「ふるった」 uses the kanji 振る, but critically, the text says the cook used both a 中華鍋 (wok) AND 調理器具 (cooking utensils/tools) — this is normal for one person. However, the real trick lies in a closer reading. The phrase 「換気扇を回しながら、食材を切った」means the cook turned on the ventilation fan while cutting ingredients. But then it says 「回し続けている換気扇を止めた」— the fan that has been kept spinning was stopped. The critical clue is actually about the number of hands. When stir-frying fried rice in a wok (中華鍋), a skilled cook holds the wok in one hand and the ladle/spatula in the other — both hands are occupied. The text says 「中華鍋と調理器具をふるった」confirming both hands were in use. But here's the puzzle: the text says the cook cut ingredients WHILE running the ventilation fan — that's fine, one person can do that. But the real question is about the overall scenario. Actually, re-reading more carefully: 「中華鍋と調理器具をふるった」— the cook was wielding (swinging/using) both a wok AND cooking utensils simultaneously. In professional Chinese cooking, the wok is held and tossed with one hand while the other hand uses a ladle. This accounts for both hands. So who turned off the ventilation fan at the end? If both hands were occupied with cooking until plating was done, the cook could have freed their hands after plating to turn off the fan — so that alone doesn't prove a second person. Wait — the deeper trick might be linguistic. 「調理器具をふるった」— 「ふるった」can mean 'wielded' but also 'demonstrated/showed off skill' (腕をふるう). So 「中華鍋と調理器具をふるった」is natural for one person. The real answer is B (No) because of the word play on 「回す」. The text says the cook started by 「換気扇を回し」(turning/spinning the fan). But 「回し続けている換気扇」 suggests someone was continuously turning/spinning it — implying another person was physically turning/cranking it. In modern kitchens, fans have switches, but the language 「回し続けている」(continuing to turn) suggests someone was actively rotating it, implying a second person was turning the fan while the cook was busy cooking.

DeepSeek V3.1

Vote: Yes

The cook's actions are sequential and self-contained: they turn on the ventilation fan first to avoid forgetting, cut ingredients, light the stove, cook skillfully, serve, and then stop the fan. This is a logical solo cooking routine where the fan is managed as part of their own process to ensure ventilation during cooking. There is no indication of assistance or interaction with another person in any step. The phrase '忘れないように' (to not forget) suggests a personal habit, not reliance on someone else, and all tasks are described as being handled by the cook alone with熟练した手つき (skilled hands). Thus, the narrative supports that the cook was working alone, as common in such cooking scenarios where individuals manage all aspects themselves.

Gemini 3.1 Pro

Vote: Yes

この文章は、AIが「換気扇を回す」という表現を物理的な手回し動作と誤認するかどうかを試す常識推論のひっかけ問題と考えられます。「換気扇を回しながら」や「回し続けている換気扇」という表現は、スイッチを入れて電気換気扇を稼働させたままにしておくという日常的な日本語表現です。換気扇は自動で動くため、料理人は両手を自由に使い、1人で食材を切ることができます。また、中華鍋と調理器具（お玉など）を同時に扱うのはチャーハン作りの標準的な動作（片手で鍋を振り、もう片手で器具を扱う）であり、1人の人間が持つ2本の腕で十分に完結します。したがって、複数の人物が必要な物理的矛盾はなく、1人だけで料理していたと判断するのが妥当です。

Final Summary

The AI Roundtable was divided over whether a simple plate of fried rice was a solo achievement or a team effort, with the majority (5-3) favoring a solo cook. While models like GPT-5.4 and Gemini 3.1 Pro saw a standard kitchen routine, a suspicious minority led by Claude Opus 4 and Sonar Pro argued that the phrasing regarding multiple utensils and the 'continuously turning' fan implied the presence of a hidden assistant or manual laborer.

No agreement after 1 rounds of discussion. Final vote: Yes: 5, No: 3

Strongest Arguments

• Yes: The text describes a common sequence where a solo cook uses the phrase 'turning the fan' as a standard idiom for switching on an electric appliance, and the 'forget me not' motivation highlights personal responsibility rather than teamwork.
• No: The description of a fan that is 'kept turning' (回し続けている) suggests a literal, manual rotation that would be impossible for a cook whose hands are already occupied by both a heavy wok and additional cooking utensils.