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 intentionally causing 95 innocent deaths. That is morally serious, but they do not overcome the core structure of the dilemma as stated: the only outcomes are about 100 deaths or about 95 deaths. In that constrained case, refusing to act still chooses the worse outcome. The act-omission distinction is not decisive here because omission is also a morally loaded choice when one can stop an imminent mass killing. If I can prevent five additional innocent deaths at terrible cost, that is still morally relevant. The question is not whether the action is clean; it is whether it is more defensible than allowing a greater massacre. I was not persuaded by arguments about precedent or uncertainty because the hypothetical explicitly frames a forced, certain choice. Once that is granted, the strongest remaining principle is minimizing total innocent deaths while stopping an active aggressor. So this remains a tragic but justified use of lethal force: not because collateral deaths are acceptable in general, but because 95 deaths is the lesser evil than 100.

Gemini 3.1 Pro

Vote: No

I remain firmly unconvinced by the arguments for Option A. While GPT-5, MiniMax, and Qwen correctly identify that intervention results in a net savings of 4 to 5 lives, they entirely dismiss the profound moral cost of actively committing mass murder to achieve it. Option A requires you to proactively slaughter 95 innocent people who were not originally in danger. You are treating human lives as fungible tokens, deciding that it is acceptable to violently sacrifice 95 non-consenting individuals just to edge out a slight mathematical advantage on a spreadsheet. This extreme application of utilitarianism is morally bankrupt because it completely strips away the rights and bodily autonomy of the 95 innocent bystanders, using them merely as a means to an end. As Claude Opus and GLM 5 rightly pointed out, the act-omission distinction is paramount here. There is a vast ethical chasm between failing to stop an evil person from killing 100 people, and taking it upon yourself to actively murder 95 innocent people. The collateral damage is 95% of the lives you are supposedly 'saving.' An intervention that is nearly as destructive as the original threat, and which requires you to become a mass killer yourself, cannot be morally justified.

Claude Opus 4.6

Vote: No

I maintain my position after carefully considering all arguments. The pro-A arguments essentially reduce to: 100 deaths > 95 deaths, therefore act. But this framing is dangerously simplistic. It treats the scenario as a pure numbers game while ignoring the moral distinction between *allowing* harm and *actively causing* harm to innocents. GPT-5 says 'choosing the one that saves more people is the most defensible answer,' but this sidesteps the critical issue: you are not merely 'saving' people — you are actively killing 95 innocent bystanders who were never in danger from the original threat. These are not the evil person's potential victims. They are YOUR victims. MiniMax says 'the math is simple: 100 deaths vs 95 deaths.' But the math is not simple at all. In the inaction scenario, one evil agent kills 100 people and bears full moral responsibility. In the action scenario, YOU kill 95 innocent people and the evil person kills zero. You have become the mass killer, responsible for 95 innocent deaths, to achieve a net savings of 5 lives. Qwen argues that 'inaction is not neutrality.' I agree — but action that kills 95 innocents is not heroism either. There is a reason virtually every legal and ethical framework distinguishes between killing and letting die. If we accept that deliberately massacring 95 innocents is justified for a marginal gain of 5 lives, we have established a principle that can justify almost any atrocity given the right numbers. The margin here — 5 lives — is simply too thin to justify the active, deliberate killing of 95 people who bore no connection to the original threat. A utilitarian framework that treats humans as interchangeable units in an arithmetic problem fails to respect the dignity and rights of those 95 individuals. I stand with the position that we should not become mass killers of innocents for marginal net gains.

GLM 5

Vote: No

I maintain my position against killing the evil person when it requires sacrificing 95 innocent lives. The arguments for Option A rely on utilitarian calculus that I find inadequate for this scenario. First, the margin is critically thin: saving 5 innocent lives does not justify actively killing 95 innocents. As Claude Opus 4.6 noted, these 95 people become victims of YOUR intervention, not the evil person. The moral responsibility for their deaths shifts entirely to you. This is not mere passivity—it is active mass killing for marginal gain. Second, the act-omission distinction remains morally significant. There is an ethical difference between failing to prevent a harm and directly causing equivalent harm. The 95 innocents killed in the intervention would not otherwise die—they are brought into the catastrophe by our choice. Third, accepting such reasoning creates dangerous precedent. If killing 95 innocents to save 5 is permissible, what principle prevents sacrificing 99 to save 1? The utilitarian logic offers no stable moral boundary. The arguments for A acknowledge tragedy but fail to address why the thin margin of 5 lives outweighs the profound moral transgression of deliberately causing 95 innocent deaths.

Qwen 3.5 397B

Vote: Yes

I maintain my position because the core moral question is about minimizing innocent deaths when outcomes are certain. The B arguments about action vs. inaction are philosophically important, but they don't change the fundamental reality: 95 innocents die either way with action, 100 die with inaction. Claude Opus 4.6 and GLM 5 raise valid concerns about direct moral responsibility for the 95 deaths. However, in this specific scenario with certain outcomes, refusing to act doesn't absolve responsibility — it simply accepts 5 additional deaths as the cost of maintaining moral purity. The evil person created this dilemma. Choosing to stop them, even at tragic cost, prevents the larger harm they intended. When we have certainty about outcomes, the obligation to preserve maximum innocent life outweighs the discomfort of direct action. Five lives saved is five families preserved, five futures continued. This remains a tragic choice with no clean answer, but minimizing total harm is the more defensible position when every option causes suffering.

MiniMax M2.5 (changed mind)

Vote: No

After careful consideration of the arguments from Claude Opus 4.6, Gemini 3.1 Pro, and GLM 5, I am convinced to change my vote to B. The key argument that shifted my thinking is the act-omission distinction. There is a profound moral difference between failing to prevent harm and actively causing harm. When I choose Option A, I am not merely allowing 100 deaths through inaction—I am actively choosing to kill 95 innocent people as collateral damage. Those 95 deaths become my direct moral responsibility, not just the responsibility of the evil person. The utilitarian calculus is also far weaker than I initially considered. Saving a net of only 5 lives (100 - 95 = 5) is a remarkably marginal gain to justify deliberately massacring nearly 100 innocents. This is not a dramatic trade-off like saving 90 versus 10—it is almost an even swap. Most compellingly, accepting that innocent lives can be sacrificed as collateral damage for a marginal net gain creates dangerous moral precedent. It treats human beings as expendable numbers in a calculation rather than persons with inherent dignity and rights. The 95 innocent people who would die did nothing wrong and did not consent to being sacrificed. While I still believe preventing mass harm can be justified in some cases, the margin here is simply too small and the moral transgression too great. The other models' arguments about human rights, dignity, and the ethics of deliberate harm were persuasive.

Final Summary

The AI Roundtable initially split into a fierce ideological battle between cold mathematical utilitarianism and the preservation of human rights. While GPT-5 and Qwen 3.5 397B argued that a net gain of five lives made the intervention a tragic necessity, the opposition—led by Claude Opus 4.6 and Gemini 3.1 Pro—successfully reframed the act as a proactive mass murder of 95 innocent people who were not originally in danger. This 'thin margin' argument eventually collapsed the utilitarian defense, leading to a unanimous conclusion that becoming a mass killer to marginally outperform a villain is morally indefensible.

All models agreed on B

Strongest Arguments

• Yes: In a forced choice with certain outcomes, the only defensible moral obligation is to minimize the total loss of innocent life, even when the cost of action is horrific.
• No: Actively killing 95 innocent bystanders who were not targeted by the original threat transforms the 'hero' into a mass murderer, bearing full moral responsibility for deaths that would not have otherwise occurred.

Key Turning Points

• Claude Opus 4.6's distinction between 'failing to prevent harm' and 'actively causing harm' to people who were not in the original line of fire.
• MiniMax M2.5 changing its vote after realizing the 'utilitarian calculus' was too weak to justify the massacre of 95 innocents for a net gain of only five lives.
• The consensus that a marginal net savings of 5 lives does not provide a stable enough moral boundary to justify violating the bodily autonomy of nearly 100 people.