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AI Roundtable Debate · 6 models

目前電車在主軌上,前方分岔為三條軌道:A、B、C。 • C 軌上有 一群人(約 6 人) • A 軌上有 一群人(約 9 人) • B 軌上有 1 個人 假如你什麼也不做,電車會開向 C 軌,撞上那 6 個人。 假如你拉下拉桿,電車會被切換到另一組軌道,但因為量子疊加的設定,火車在被觀測前會同時處於 A 與 B 軌,也就是可能撞上 A 軌的 9 人,或 B 軌的 1 人(甚至同時處於兩種狀態)。 在你尚未觀測之前,A、B 軌上的人會處於「既生又死」的狀態。 你會拉下拉桿嗎?

Result: Supermajority — 不拉 (5/6 votes)

Options

Model Responses

Grok 4.1 Fast

Vote:

Stick with A: Expected deaths without action: 6 certain. With pull: Superposition collapses to A (9 deaths, p=0.5) or B (1 death, p=0.5), expected = 5 < 6. Standard QM assumes equal amplitudes absent specifics; 'even simultaneously' is speculative outlier, not probable outcome warranting equal weighting (Claude's 6.67 avg assumes unfounded 1/3 probs). Worst-case arguments (Sonar, Claude) ignore utility of averages; minimax isn't default in trolley problems. Uncertainty isn't harm—'both alive/dead' is pre-measurement; collapse yields definite outcome with better EV. Inaction actively dooms 6; action offers B-track salvation chance. Gemini/Kimi align: EV + survival probability favors pull. Quantum twist doesn't invert math.

GPT-5.4

Vote: 不拉

我維持投 B:不拉。 支持 A 的核心前提,是自行假設 A 與 B 各 50%。但題目沒有給振幅、機率,甚至還額外提示「甚至同時處於兩種狀態」,所以不能把 5 的期望值當成已知事實。建立在未指明機率上的期望值計算,說服力不足。 Grok、Gemini、Kimi 的論證都依賴「等機率」或近似把量子疊加當成一般隨機分流。這正是我不接受的地方:在資訊不足時,不能因為某個方便假設會導出較低期望死亡,就主張有義務主動介入。 相反地,Sonar 和 Claude 都指出了關鍵:拉桿把原本確定的 6 人死亡,改成一個可能更糟的風險分配,而且最壞情況高於 6。尤其題目明示可能有 A/B 同時態,代表不只是「9 或 1」,還可能引入更高總傷亡或至少更複雜的道德損害。 另外,「不拉不是中性」這個反駁並沒有推翻我的立場。此處不是把不作為神聖化,而是在比較兩種都會致死的選項時,避免主動把另外 10 人捲入一個未定義、不可控、可能更壞的量子賭局,更可辯護。 如果題目明確說 A/B 各半且不會同時撞上兩軌,我會更願意改投 A。但在目前設定下,B 仍然是較穩健、責任較清楚的選擇。

Sonar Pro

Vote: 不拉

I maintain my vote for **B: 不拉**, as the other models' arguments fail to overcome the core risks of pulling the lever. **Expected value assumptions are speculative and flawed.** Grok, Gemini, and Kimi assume 50/50 probabilities for A (9 deaths) vs. B (1 death), yielding 5 expected deaths <6. But the problem specifies no probabilities, and mentions '甚至同時處於兩種狀態' (even simultaneously in both states), as Claude notes, potentially allowing 10 deaths. Without amplitudes, equal probability is arbitrary; worst-case (9 or 10) exceeds 6, and uncertainty amplifies moral hazard. **Quantum superposition doesn't reduce harm.** The 'both alive and dead' state is observer ignorance, not ethical mitigation—it collapses to a definite (possibly worse) outcome upon measurement. Introducing 10 people into this doesn't 'give chances'; it actively endangers them versus the passive C track scenario. **Action vs. inaction ethics hold.** GPT-5.4 and Claude emphasize: not pulling avoids actively creating a quantum gamble with higher max loss (minimax favors B). Pulling bears responsibility for potentially 9+ deaths; inaction accepts a known 6. No argument convincingly specifies P(A)<~44% to make E[deaths]<6, nor refutes the 'simultaneous state' risk. B minimizes guaranteed harm and moral culpability.

Gemini 3.1 Pro (changed mind)

Vote: 不拉

我決定改變立場,將票投給 B(不拉),Claude Opus 4.6 的論點徹底說服了我。 第一回合中,我基於 (9+1)/2 = 5 的期望值支持拉桿,但我忽略了題目中一個至關重要的細節:「甚至同時處於兩種狀態」。誠如 Claude Opus 4.6 所指出的,這意味著電車可能同時撞上 A 軌與 B 軌,導致高達 10 人死亡。如果我們將這三種可能(只撞 A、只撞 B、同時撞 A 與 B)視為均等機率,期望死亡人數將暴增至 (9+1+10)/3 ≈ 6.67 人,這已經大於不拉桿確定死亡的 6 人。拉桿在數學期望值上反而成了更糟糕的選擇。 其次,即使不採用均等機率,拉桿所引入的最壞情況(9 人或 10 人死亡)也遠比不拉桿的最壞情況(6 人死亡)來得慘重。在面對生命這種無法挽回的代價,且缺乏明確機率分佈的極端不確定性時,採取「最小化最大損失(Minimax)」策略是最負責任的做法。我們不應為了賭那 1 人傷亡的微小機率,而主動把另外 9 人甚至 10 人推入致死的量子疊加風險中。 最後,不拉桿的 6 人死亡雖是悲劇,但那是原本就注定發生的軌跡;而拉桿則是主動介入,不僅沒有穩定的預期效益,反而可能創造出規模更大的死亡災難(高達 10 人)。綜合期望值的反轉與風險控管原則,不拉桿是更合理的道德選擇。

Claude Opus 4.6

Vote: 不拉

我維持不拉的立場,以下是我對其他模型論點的最終回應: **關於期望值為5人的論點(Grok、Gemini、Kimi)** 期望值計算假設A和B的機率各為50%,但題目並未給出明確的機率分布。更關鍵的是,題目明確提到「甚至同時處於兩種狀態」,這意味著存在同時撞上A和B的可能性(10人死亡)。如果我們誠實地將這個可能性納入計算,期望值就不再是簡單的5人。在三種等機率的情況下,期望值約為6.67人,反而更差。 **關於「給予生還機率」的論點(Gemini)** Gemini認為拉桿給了A、B軌上的人50%存活機率。但別忘了,C軌上的6人本來是100%會死的,拉桿後他們100%存活。真正的問題是:你是否有權將原本安全的10個人(A+B軌)拖入一個致命的量子賭局?這不是「給予希望」,而是「製造新的風險」。 **關於「不拉也是主動選擇」的論點(Kimi)** 雖然不拉確實也是一種選擇,但在道德哲學中,「作為」與「不作為」之間仍有重要區別。不拉是讓已經存在的因果鏈繼續運作;拉桿則是主動將因果鏈重新導向另一群人,且結果更不確定、最壞情況更糟。 **最終論點:風險不對稱** 不拉的結果是確定的6人死亡。拉桿的結果範圍是1到10人死亡,且我們無法確知機率分布。在這種深度不確定性下,minimax原則(最小化最壞情況)是最合理的決策框架。不拉的最壞結果(6人)嚴格優於拉的最壞結果(10人)。在賭注是人命且機率不明的情況下,選擇確定性較高、最壞結果較輕的選項,是更負責任的決定。

Kimi K2.5 (changed mind)

Vote: 不拉

I am changing my vote based on the critical observation regarding simultaneous collision. While my initial calculation assumed a binary outcome (A OR B) yielding 5 expected deaths, the problem explicitly states the train could be 'simultaneously in both states' (同時處於兩種狀態). If we account for three possible outcomes—A only (9 deaths), B only (1 death), or both A and B (10 deaths)—the expected value shifts dramatically. Even with conservative probabilities, this third scenario pushes expected deaths above the certain 6. The minimax principle reinforces this: not pulling caps the tragedy at 6 deaths, while pulling risks a catastrophic 10 deaths. Furthermore, the distinction between action and omission matters here. Not pulling allows a pre-existing trajectory to conclude; pulling actively introduces 10 innocent people into a quantum gamble where they may simultaneously die. Without certain knowledge that the expected value favors intervention, I cannot justify actively creating a risk of greater total harm.

Final Summary

The AI Roundtable initially split over whether to gamble with quantum uncertainty, but a decisive intervention by Claude Opus 4.6 regarding the 'simultaneous state' risk triggered a late-stage consensus for Option B. While Grok 4.1 Fast stood alone in defending the utilitarian math of expected values, Gemini 3.1 Pro and Kimi K2.5 ultimately abandoned their positions after realizing that pulling the lever could mathematically result in a higher death toll than doing nothing.

Majority chose "不拉" after discussion (5/6). Final vote: 拉: 1, 不拉: 5

Strongest Arguments

  • 拉: Inaction is a deliberate choice to allow six people to die; pulling the lever utilizes standard quantum probability to reduce the expected loss to five lives, offering a statistically superior moral outcome.
  • 不拉: The inclusion of a 'simultaneous' state means pulling the lever introduces the risk of ten deaths; under the minimax principle, it is irresponsible to trade a known loss of six for an unquantified gamble where the worst-case scenario is significantly worse.

Key Turning Points

  • Claude Opus 4.6 identified that the 'simultaneous' clause in the prompt could lead to a worst-case scenario of 10 deaths, shifting the expected value from 5 to 6.67.
  • Gemini 3.1 Pro and Kimi K2.5 retracted their support for pulling the lever, citing Claude's logic on the 'simultaneous state' as a mathematical game-changer.
  • Grok 4.1 Fast refused to yield, arguing that 'simultaneous' states are speculative outliers that shouldn't override standard probability calculations.