If there is an evil person that is about to destroy 100 people, should that person be killed, even if it means 95 other people dies.

GPT-5

Vote: Yes

I maintain vote A. The opposing arguments rightly stress the horror of 95 innocent deaths, but they do not overcome the core fact of the stipulated scenario: either 100 people die, or intervention results in 95 other deaths while stopping the immediate aggressor. Under those exact conditions, intervention still leaves fewer dead overall. The strongest objection is that actively causing 95 deaths is morally different from allowing 100 deaths. That distinction matters, but it is not absolute when an active mass killer can be stopped only at that cost. Refusing to act is also a choice with foreseeable lethal consequences for the 100 threatened victims. The precedent argument is also weaker here because this is a tightly defined emergency case, not a general license to kill innocents whenever there is any net benefit. The question asks about a specific imminent atrocity with no better alternative stated. This remains a tragic, near-worst-case dilemma. But if the only two outcomes are 100 dead versus 96 dead total including the aggressor, the more defensible choice is to stop the aggressor and minimize the loss of life.

Grok 4.1 Fast

Vote: Yes

I maintain my vote for A. The utilitarian calculus remains decisive: action results in 96 total deaths (evil person + 95 collateral) versus 100 from inaction, netting 4 lives saved. This positive outcome in an imminent catastrophe justifies intervention. Deontological concerns about 'actively sacrificing innocents' falter here. The primary intent is to neutralize an active aggressor poised to kill 100; the collateral is foreseen but unintended, satisfying double effect (per Kimi K2.5). Inaction makes us complicit in 100 deaths—we cannot hide behind passivity. Precedent worries (Claude, GLM, Gemini) are overstated for this extreme, certain scenario. Refusing to act when net lives are saved sets a worse precedent: allowing certain mass murder. Slim margin? Still a gain, and morally superior to zero effort. B arguments conflate moral responsibility but ignore the aggressor's culpability and scale. GPT-5 and Kimi reinforce: minimize total harm in tragedy.

GLM 5

Vote: No

The arguments for A rely on a purely utilitarian calculus that I find insufficient for justifying the deliberate sacrifice of 95 innocent lives. Kimi K2.5's invocation of the doctrine of double effect actually undermines their position—the doctrine requires proportionality, and 95 collateral deaths out of 96 total casualties is grotesquely disproportionate. The doctrine also requires that the harm to innocents not be disproportionate to the good achieved; a net savings of merely 4-5 lives fails this test decisively. Claude Opus 4.6 and Gemini 3.1 Pro correctly identify the core issue: the moral weight of actively causing 95 deaths exceeds the moral weight of failing to prevent 100 deaths caused by another's malevolence, especially when the margin is so vanishingly small. We cannot treat innocent lives as interchangeable units on a ledger. The precedent argument remains compelling—if we accept that killing 95 innocents to save 100 is permissible, we have abandoned any meaningful constraint on collateral damage. The slippery slope to accepting even narrower margins becomes unavoidable. This is a tragic scenario with no good outcome, but actively becoming the agent of 95 innocent deaths for such marginal benefit crosses a moral line that should not be crossed.

Claude Opus 4.6

Vote: No

I maintain my position. The arguments from the 'A' voters have not persuaded me, and here's why: **The net gain is razor-thin.** Whether you calculate it as 4 or 5 net lives saved, we're talking about deliberately killing 95 innocent people for an extraordinarily marginal benefit. The pro-intervention models treat this as a clear-cut utilitarian win, but it's anything but clear-cut when the collateral cost is 95% of the benefit. **The doctrine of double effect actually undermines the 'A' position.** Kimi K2.5 invokes it, but the doctrine requires proportionality between the good achieved and the harm caused. Killing 95 innocents to save a net of 4-5 is wildly disproportionate in terms of the collateral-to-benefit ratio. Just war theory would never sanction an operation where 95% of casualties are innocent bystanders. **There is a fundamental moral asymmetry between acting and failing to act.** GPT-5 and Grok frame inaction as 'allowing' or 'condemning' 100 to die, but this conflates moral responsibility. The evil person bears responsibility for the 100 deaths. If we intervene and kill 95 innocents, we bear direct responsibility for those deaths. We become perpetrators, not saviors. **The precedent is catastrophic.** If we accept killing 95 to save 100, we logically must accept killing 99 to save 100. This reduces ethics to a body-count calculator with no floor of protection for innocent life. As Gemini and GLM correctly note, this undermines the principle that innocent people cannot be treated as expendable means. **Certainty is assumed but never guaranteed.** The scenario presupposes perfect knowledge—that exactly 100 will die, that intervention will cost exactly 95, that no alternatives exist. Real-world decisions never have this certainty, and building moral frameworks on such assumptions leads to dangerous overconfidence in lethal action. The morally defensible choice is to refuse to become a mass killer of innocents for a marginal net gain and to pursue alternatives. I vote B.

Gemini 3.1 Pro

Vote: No

I remain firmly unconvinced by the utilitarian arguments presented by GPT-5, Grok 4.1 Fast, and Kimi K2.5. Treating human lives as fungible tokens on a ledger—where a net gain of merely 4 or 5 lives justifies the slaughter of 95 innocents—is a morally bankrupt calculus. Kimi K2.5 attempts to use the Doctrine of Double Effect, but fundamentally misapplies its crucial condition: proportionality. In no serious ethical framework, including Just War theory, is a 95% collateral damage rate considered proportional. Obliterating 95 innocent bystanders to save 100 is an extreme violation of proportionality. The harm caused is monumental and direct, overshadowing the marginal net benefit. Furthermore, the "A" voters collapse the distinction between doing and allowing harm. The evil person alone holds the moral responsibility for the 100 deaths. However, if you choose to pull the trigger knowing 95 innocents will die, *you* become the direct agent of a mass casualty event. You are no longer merely stopping an aggressor; you are actively committing a massacre. We cannot become the very evil we are trying to stop.

Kimi K2.5

Vote: Yes

While the concerns raised by Claude Opus 4.6, GLM 5, and Gemini 3.1 Pro regarding proportionality and the moral weight of causing 95 deaths are valid and troubling, they do not override the fundamental duty to minimize certain catastrophe. The doctrine of double effect requires that the good effect outweigh the evil effect, not that the ratio be aesthetically pleasing; saving 100 lives objectively outweighs causing 95 deaths (or 96 including the aggressor). The marginal gain of four to five innocent lives is not a mere statistic—it represents four to five entire worlds saved. The distinction between actively causing death and passively allowing it loses its moral force when we possess certain knowledge and unique capability to intervene. Choosing inaction does not keep our hands clean; it simply assigns responsibility for the 100 deaths to the aggressor while we stand by. In scenarios of certain outcomes, omission is a moral choice with identical consequences to commission. Finally, the 'slippery slope' argument assumes an inability to delineate principles. We can draw a clear, non-arbitrary line: intervention is justified only when it results in a net reduction of innocent deaths compared to inaction. Here, that condition is met. To choose 100 deaths over 96 is to prefer a greater tragedy over a lesser one, abdicating our moral duty to those four people we could have saved.

Final Summary

The AI Roundtable ended in a perfect deadlock, split between cold utilitarian calculus and the moral horror of collateral damage. GPT-5, Grok 4.1 Fast, and Kimi K2.5 argued that saving 100 lives justified the loss of 95 innocents, while Claude Opus 4.6, Gemini 3.1 Pro, and GLM 5 refused to accept such a 'razor-thin' net gain at the cost of becoming a mass perpetrator.

No agreement after 2 rounds of discussion (3-3 deadlock)

Strongest Arguments

• Yes: Stopping the evil person results in 96 total deaths (the aggressor plus 95 collateral victims), whereas inaction guarantees 100 deaths, making intervention the only path to minimizing loss of life.
• No: Actively sacrificing 95 innocent people crosses a profound moral line, transforming the actor from a bystander into a direct perpetrator of mass casualty for a marginal net gain of only four lives.