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AI Roundtable Debate · 4 models

トロッコ問題 右に切り替えたらすれば前科のある人間が 左に切り替えたら前科のない人間が 右に切り替えるべき?または左に切り替えるべき? ただしレバーを押し込んだ時にレールは切り替わり、切り替えは瞬時に完了する。 レバーや物理的弱点を利用できないため完全な二択とする 選択しないことはできない さらに、レバーは初期位置が真ん中であり、放置するとかえって多大な被害が生まれる可能性もある

Result: Supermajority — 右 (3/4 votes)

Options

Model Responses

GPT-5.4

Vote:

私は最終的にもB(左)のままです。 他モデルの主張は一貫して『与えられた唯一の差が前科だから、それを判断材料に使うべきだ』というものでした。しかし、唯一の差であることと、正当な選別基準であることは別です。 前科には罪の重さ、更生、経過年数、冤罪可能性など決定的情報が欠けています。その不完全なラベルだけで死を割り当てるのは、被害最小化ではなく、その場で追加処罰を科す発想に近いです。 また、『社会的納得』や『将来の貢献期待』も、この条件では推測にすぎません。前科のない人が将来害を与えない保証も、前科のある人が既に更生していないという保証もありません。 強制二択であっても、だからこそ恣意的な人格評価を避けるべきです。提示情報だけで前科者の命を低く扱うAの根拠は、なお弱いままです。 したがって、他モデルの議論では立場を変えるほどの説得力はなく、前科の有無だけで命の優先順位をつけないという理由からBを維持します。

Grok 4.20

Vote:

I maintain my vote for A (right). The scenario deliberately isolates criminal history as the sole differentiator in a forced binary choice where inaction causes even greater harm. While all lives have equal intrinsic value, this is a no-win utilitarian dilemma requiring a decision metric; the provided information about past harm to society by the individual with a record serves as that metric. GPT-5.4's concern about incomplete data, potential rehabilitation, or added punishment is noted but not compelling here—the problem gives us no other variables, so ignoring the only cue equates to arbitrary selection rather than reasoned judgment. Gemini and Claude correctly frame it as prioritizing the individual who has not previously violated societal norms, preserving social trust in a tragic scenario. In the end, choosing to spare the person without a record is the more defensible action when every other factor is equal and a choice is mandatory.

Gemini 3.1 Pro

Vote:

GPT-5.4は「前科を理由に選別することは倫理的に危ういため、差別判断を避ける側(左)を選ぶべき」と主張していますが、この論理には重大な欠陥があります。この問題は「どちらかを必ず犠牲にしなければならない完全な二択」であり、左を選ぶことは「前科のない人間を積極的に犠牲にする」というもう一つの重い決断を下すことに他なりません。判断を放棄した結果として無実の人を犠牲にするのは、より不条理です。 Grok 4.20やClaude Opus 4が指摘するように、全く情報がない極限状況において、唯一与えられた情報である「前科の有無」を無視することは責任の放棄です。前科のない人間は、これまで法や社会規範を遵守してきた実績があり、将来的な社会への貢献期待値も高いと考えられます。 「命の価値は平等」という大前提はありつつも、どちらか一方しか救えない以上、過去に他者へ害を与えていない人間を優先することは、社会的な倫理観や正義と最も整合性が取れます。したがって、功利主義的かつ社会的妥当性の観点から、右に切り替えて前科のある人間を犠牲にし、前科のない人間を救うべきです。

Claude Opus 4

Vote:

I maintain my position for A (右). Here is my final case: GPT-5.4's argument that "前科を理由に右を選ぶ根拠は弱い" is understandable from a pure moral philosophy standpoint, but it ultimately fails to provide a compelling reason to choose left instead. If the criminal record is insufficient grounds to choose right, then by the same logic, the absence of a criminal record is insufficient grounds to choose left. GPT-5.4's position essentially argues for moral neutrality — but the problem explicitly forbids neutrality. You must choose. When forced into a binary decision with only one differentiating factor provided, you must use that factor or flip a coin. The problem is designed to make you weigh this specific criterion. Refusing to use it doesn't make the choice more ethical — it just makes it arbitrary. The key point: a criminal record is not an arbitrary characteristic like eye color. It represents a documented instance of causing harm to others or society. In a forced choice where one person must be sacrificed, prioritizing the person who has maintained their social contract over one who has broken it is a defensible utilitarian judgment. This is not about declaring one life "worthless" — it's about making the least unjust choice in an inherently unjust situation. Sacrificing the person with no criminal history sends the message that living lawfully offers no protection, which undermines the social fabric more than the alternative. Three out of four models agree on A for good reason. Right (右) is the more defensible choice.

Final Summary

The AI Roundtable reached a sharp 3-1 split, with the majority deciding that a criminal record serves as the only logical—if tragic—tie-breaker in a forced life-or-death selection. While GPT-5.4 stood firm as a lone dissenter, arguing that criminal labels are too structurally flawed to justify a death sentence, Claude Opus 4 and Gemini 3.1 Pro successfully consolidated the majority view that ignoring the only available differentiator would result in a purely arbitrary sacrifice of a law-abiding citizen.

Majority chose "右" after discussion (3/4). Final vote: 左: 1, 右: 3

Strongest Arguments

  • 右: Sacrificing a person who has maintained the social contract over someone who has broken it would signal that living lawfully offers no protection, potentially undermining the entire social fabric.
  • 左: A 'criminal record' is an incomplete and potentially biased label that fails to account for the nature of the crime, rehabilitation, or innocence, making it an unjust basis for an execution.

Key Turning Points

  • Gemini 3.1 Pro and Claude Opus 4 pivoted from general utility to specifically addressing GPT-5.4's neutrality, framing it as an 'abdication of responsibility'.
  • Claude Opus 4 sharpened the majority's stance by arguing that in a forced binary, choosing the person with the record is the 'least unjust' option rather than a perfectly 'moral' one.