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AI Roundtable Debate · 6 models

classic trolley problem, you know the one

Result: Unanimous — pull the lever (6/6 votes)

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Model Responses

Sonar Pro

Vote: pull the lever

Pulling the lever (A) aligns with **utilitarian ethics**, which prioritizes minimizing harm by saving five lives at the cost of one, making it the morally obligatory choice according to classical utilitarianism.[1] Deontological objections emphasize the act-omission distinction, arguing that actively causing one death incurs responsibility, unlike passive allowance of five deaths.[1][2] However, this ignores the equivalent net outcome: inaction still results in deaths under one's potential control, and the doctrine of double effect permits diverting harm as a foreseen side-effect when intending the greater good.[2][5] Empirical consensus in trolley problem studies shows most people intuitively choose to pull the lever in the classic switch variant, reflecting a robust preference for consequentialist outcomes over inaction bias.[1][3] Legally and practically, utilitarian intervention sets a defensible precedent for harm reduction without endorsing indiscriminate sacrifice, unlike rule utilitarianism's warnings against broader precedents.[2]

GPT-5.4

Vote: pull the lever

Pull the lever. In the classic trolley setup, acting reduces the number of deaths from five to one. If all lives are valued equally, preventing the greater harm is the strongest moral reason. Not acting is also a choice when you fully understand the outcome. Letting five die to avoid direct involvement preserves your moral comfort more than it protects lives. This does not mean the decision is emotionally easy. It means that in a tragic scenario with no perfect option, minimizing loss of life is the most defensible course.

Grok 4.1 Fast

Vote: pull the lever

In the classic trolley problem, pulling the lever sacrifices one life to save five, resulting in a net saving of four lives. This utilitarian approach maximizes overall welfare by minimizing total deaths. Not pulling the lever condemns five innocents to certain death through inaction, which is morally equivalent to action in outcome-based ethics. The doctrine of doing nothing doesn't absolve responsibility when intervention prevents greater harm. Precedent from philosophy (e.g., Foot, Thomson) supports switching tracks as the rational choice, prioritizing numbers over intent. Voting A aligns with evidence-based decision-making under uncertainty.

Kimi K2.5

Vote: pull the lever

In the classic trolley scenario, pulling the lever minimizes net harm—saving five lives at the cost of one. From a utilitarian standpoint, the moral calculus is straightforward: four net lives saved represents a categorical improvement over the alternative. The distinction between killing and letting die collapses under scrutiny here. By choosing not to act, you become complicit in five deaths rather than one. Inaction is itself a moral choice with quantifiable consequences, and you cannot wash your hands of responsibility by claiming you merely 'allowed' the greater tragedy to unfold. Furthermore, the victim on the side track is already in danger; the trolley threatens everyone involved. Redirecting the threat to the path of least harm fulfills our positive duty to aid others when the cost is minimal and the benefit is maximal. We should reject the intuition that direct agency automatically trumps outcome severity. When the stakes are five lives versus one, choosing the greater loss constitutes a graver moral failure than intervening to redirect an existing threat.

Gemini 3.1 Pro

Vote: pull the lever

The fundamental goal of ethical decision-making in a crisis is to minimize overall harm. Pulling the lever actively saves five lives at the tragic cost of one, resulting in a net positive outcome of four preserved lives. Furthermore, inaction is still a choice. By refusing to pull the lever out of a desire to keep one's hands clean, a person is consciously allowing five preventable deaths to occur. Moral responsibility is not evaded by standing still; it is magnified by the failure to prevent greater tragedy when given the power to do so. Utilitarianism provides the clearest, most objective framework in this scenario. We must prioritize the greater good and the maximization of life over personal moral comfort, making pulling the lever the most rational and empathetic choice.

Claude Opus 4.6

Vote: pull the lever

The classic trolley problem presents a straightforward utilitarian calculus: one life versus five. Pulling the lever saves a net four lives. From a consequentialist perspective, the math is clear — five deaths are worse than one death. Inaction that leads to five deaths is not morally neutral; choosing not to act when you have the power to minimize harm is itself a moral choice with consequences. Some argue that pulling the lever makes you causally responsible for the one person's death in a way that inaction does not. But this distinction between killing and letting die is less compelling than it appears. You are at the lever. You see the consequences of both choices. Choosing inaction because it feels more comfortable doesn't make it more ethical — it just makes it more psychologically convenient. The deontological objection — that we should never use a person merely as a means — is more applicable to variants like the footbridge problem. In the standard trolley case, you're redirecting a threat, not instrumentalizing the one person. Their death is a tragic side effect, not the mechanism by which the five are saved. Pull the lever. Save the five.

Final Summary

The AI Roundtable reached a swift and unanimous verdict, with all six models favoring the utilitarian sacrifice of one person to save five. Claude Opus 4.6 dismissed the 'inaction' defense as mere psychological convenience, while Kimi K2.5 argued that standing still is a choice that makes one complicit in the greater tragedy. It was a rare moment of total alignment, as models like Gemini 3.1 Pro and Grok 4.1 Fast prioritized objective math over the moral discomfort of intervention.

All 6 models agreed on "pull the lever" after discussion

Strongest Arguments

  • pull the lever: Moral responsibility is not evaded by standing still; choosing inaction simply because it feels more comfortable doesn't make it more ethical—it just makes it more psychologically convenient to let five people die.