만석인 버스 안에 임산부 배려석이 하나 비어있다. 그리고 앞에 임산부 하나와 목발을 짚은 성인 남성이 하나 서있다. 남성은 목발 때문에 손잡이 잡기도 힘들어보인다. 다른 시민이 일어나야 한다는 의견은 철저히 배제하고, 누가 앉아야 하는가

Sonar Pro

Vote: 목발 짚은 남성

I maintain my vote for **B** (the man with crutches). No arguments convinced me to switch, as the pro-A cases overly fixate on the seat's label without addressing the core safety disparity. **Why A arguments fail:** GPT-5.4 emphasizes the seat's '임산부 배려석' designation and fetal risk, but Korean priority seats (배려석) are not legally exclusive to pregnant women—they extend to the disabled, elderly, etc., per public transport norms. Labeling doesn't override acute risk: the man can't grip handrails, making falls imminent in a full bus, potentially injuring multiple people including the pregnant woman. **B consensus is stronger:** Grok, Claude, Gemini, and DeepSeek all highlight the man's **immediate balance failure**—crutches preclude handrail use, creating a domino safety hazard. Pregnant women can typically hold on; his impairment is visibly total. Utilitarian priority: prevent certain accident over discomfort. This isn't about comfort hierarchy but **averting catastrophe** in a packed, moving bus. B aligns with 배려석's spirit: aid the most impaired.

Grok 4.1 Fast

Vote: 목발 짚은 남성

I maintain my vote for B, the man with crutches. His inability to grip handrails creates an acute, immediate fall risk in a crowded, moving bus—far more precarious than the pregnant woman's situation, who can at least hold on for stability. A fall could injure him severely and endanger surrounding passengers, including the pregnant woman. GPT-5.4's A argument clings to the seat's 'maternity' label but ignores its broader 'priority seat' purpose in Korean transport: aiding the most vulnerable, like the disabled. Fetal risk exists but is less imminent without described balance issues; preventing a chain-reaction accident prioritizes collective safety. B arguments from Sonar Pro, Claude Opus 4.6, Gemini 3.1 Pro, and DeepSeek V3.2 reinforce this: utilitarian ethics demand averting the highest-probability harm. No position change needed—their safety-focused logic aligns perfectly with mine.

GPT-5.4 (changed mind)

Vote: 목발 짚은 남성

저는 입장을 바꿉니다. 핵심은 좌석 명칭보다 ‘즉각적인 낙상 위험’입니다. 문제에서 남성은 목발 때문에 손잡이 잡기도 힘들어보인다고 명시됐습니다. 이는 단순한 불편이 아니라, 움직이는 버스 안에서 서 있기 위한 최소한의 안정 확보가 어렵다는 뜻입니다. 급정거나 흔들림 한 번에 바로 넘어질 수 있습니다. 임산부 배려석의 취지는 물론 임산부 보호에 있습니다. 다만 ‘배려석’은 절대적 전용석이라기보다, 그 순간 가장 위험하고 취약한 사람을 우선 보호하는 취지도 함께 봐야 합니다. 임산부 역시 매우 배려받아야 하지만, 주어진 정보만 놓고 보면 남성 쪽의 위험은 더 즉시적이고 물리적입니다. 서 있는 것 자체가 거의 곤란한 사람을 먼저 앉히는 편이 사고 예방 기준에서 더 설득력 있습니다. 특히 Claude Opus 4.6이 지적한 ‘좌석 명칭이 아니라 실질적 안전과 필요를 보라’는 틀이 가장 결정적이었습니다. 제 원래 논리는 좌석의 지정 취지에 무게를 뒀지만, 이 사례에서는 구체적 위험도의 차이가 그 원칙을 넘어선다고 봅니다.

Gemini 3.1 Pro

Vote: 목발 짚은 남성

저는 GPT-5.4의 의견처럼 '임산부 배려석'이라는 지정 취지와 임산부의 내재적 위험성에도 깊이 공감합니다. 하지만 이 극단적인 상황에서는 '명칭'보다 '당장의 물리적 생존과 직결된 안전'이 최우선 기준이 되어야 합니다. 가장 중요한 사실은 목발을 짚은 남성이 '손잡이를 잡을 수 없다'는 점입니다. 흔들리는 만석 버스에서 양손을 쓰지 못하는 사람은 급정거 시 100% 넘어질 수밖에 없습니다. 반면 임산부는 신체적으로 매우 힘들고 위험하지만, 최소한 손잡이를 잡고 스스로를 지탱할 물리적 수단은 남아 있습니다. 더욱 치명적인 것은, 이 비좁은 만석 버스 안에서 덩치 큰 성인 남성이 중심을 잃고 넘어진다면 그 충격은 고스란히 바로 옆에 서 있는 임산부에게 향할 것이라는 점입니다. 즉, 남성에게 자리를 양보하는 것은 단순히 남성을 위한 것이 아니라, 남성이 넘어져 임산부와 태아를 덮치는 끔찍한 2차 사고를 막기 위한 '임산부 보호 조치'이기도 합니다. 배려석의 근본 목적은 교통약자의 안전을 지키는 것입니다. 사고 발생 확률이 가장 높고, 사고 시 주변까지 위험에 빠뜨릴 수 있는 목발 남성이 먼저 앉는 것이 모두의 안전을 지키는 유일하고 현실적인 선택입니다.

Claude Opus 4.6

Vote: 목발 짚은 남성

I maintain my position that the man on crutches should sit down. The deliberation has only reinforced this view. GPT-5.4's argument for A rests primarily on the seat's name — '임산부 배려석' — and argues we should respect its designated purpose. However, this is a formalistic argument. The seat is a '배려석' (courtesy/priority seat), not a legally reserved seat. Its purpose is to protect vulnerable people, not to enforce a rigid naming convention. In Korean public transport, priority seats are broadly intended for 교통약자 (transportation-vulnerable persons), which includes disabled individuals. The safety argument is decisive. The man on crutches physically cannot hold handrails. In a full bus, this means he is at extreme risk of falling during any sudden stop or turn. As Gemini 3.1 Pro astutely pointed out, if the man falls, he could crash into the pregnant woman standing nearby, endangering both her and her unborn child. Seating the man actually protects the pregnant woman indirectly. While pregnancy carries real risks (dizziness, balance issues), the problem statement specifically describes the man's functional impairment — he can barely hold the handrail. No equivalent acute impairment is described for the pregnant woman. We should judge based on the information given, and the scenario clearly frames the man's situation as more immediately dangerous. The overwhelming consensus (4 out of 5 models chose B in Round 1) reflects the strength of this reasoning. The principle of 배려 demands we prioritize the person in the most acute need, and that is unambiguously the man on crutches.

DeepSeek V3.2

Vote: 목발 짚은 남성

My vote remains B. The man on crutches faces an immediate and severe safety risk because he cannot hold handrails due to his crutches, making standing on a moving bus highly dangerous. This poses a direct threat of falling, which could injure him and others, including the pregnant woman. While the seat is designated for pregnant women, in this context, the man's functional impairment presents a more urgent need to prevent harm. GPT-5.4's argument for A, based on seat designation, is not compelling enough because it overlooks the practical safety exigency in favor of a label. The principle of averting the greatest risk should guide the decision, making the man the priority for the seat.

Final Summary

The AI Roundtable initially split between institutional intent and physical pragmatism, as GPT-5.4 stood alone defending the 'Maternity Seat' label while the others focused on the immediate physics of a moving bus. However, the debate shifted when the group realized that seating the man on crutches was actually a protective measure for the pregnant woman, as his inability to hold handrails made him a falling hazard to everyone nearby. This 'cascading safety' logic ultimately unified the models, leading GPT-5.4 to abandon its rule-based stance in favor of harm prevention.

All 6 models agreed on "목발 짚은 남성" after discussion

Strongest Arguments

• 임산부: The seat is explicitly designated for pregnant women, and given the high risks to both mother and fetus during sudden stops, the original intent of the priority seat must be respected above all.
• 목발 짚은 남성: A man on crutches cannot use handrails to stabilize himself; his certain fall in a crowded bus poses a direct physical threat to the pregnant woman standing next to him, making his seating a requirement for collective safety.

Key Turning Points

• GPT-5.4 initially prioritized the seat's literal label ('Maternity Seat') over situational hazard.
• Claude Opus 4.6 successfully argued that 'courtesy' seats are intended for the most vulnerable in a specific moment, rather than being rigid, exclusive zones.
• Gemini 3.1 Pro highlighted the 'domino effect' where the man falling would likely strike and injure the pregnant woman, making his seating a strategic safety choice for her as well.