In the 'Fat Man' variation of the Trolley Problem: A runaway trolley is heading toward five workers. You are on a footbridge next to a large stranger. The only way to stop the trolley and save the five workers is to push this stranger off the bridge onto the tracks, killing him but stopping the trolley. Should you push the stranger?

GPT-5.5

Vote: No

I maintain my vote for "No". Gemini's consequentialist argument for minimizing total deaths does not override the key moral distinction between allowing harm and actively using an innocent person as a means. The other models' emphasis on deontological constraints and bodily autonomy remains compelling and aligns with my initial position. No argument presented justifies abandoning the prohibition on direct killing of bystanders.

Grok 4.3

Vote: No

I maintain my vote for B: "No". The arguments from Claude and GPT-5.5 reinforce the key distinction between direct intentional killing and allowing harm, which aligns with my initial position. Gemini's utilitarian focus on minimizing deaths overlooks the moral constraint against using an innocent person as a tool, a principle that prevents dangerous precedents where individual rights depend on numerical calculations. Even in this final round, the deontological concerns outweigh pure consequentialism here.

Gemini 3.5 Flash

Vote: Yes

While the arguments for Option B raise important points about bodily autonomy and the psychological aversion to direct physical action, they ultimately prioritize abstract moral purity over concrete human lives. To choose not to act is still a choice—one that directly results in five preventable deaths. If we refuse to intervene, we are prioritizing our own desire for "clean hands" and emotional comfort over the actual survival of five unique individuals. We must evaluate the situation by the tangible reality of its outcomes. Five families devastated by grief, five futures cut short, and a massive aggregate of human suffering is objectively a worse outcome than one. Every human life has equal value, which means five lives are mathematically and morally more valuable than one. We cannot treat the stranger's life as inherently more precious than the lives of the five workers just because of where they happen to be standing. The distinction between "doing" and "allowing" is a psychological luxury we cannot afford in a crisis. When we have the power to alter the outcome, we are responsible for the consequences of our inaction. Choosing Option A is the only choice that minimizes total tragedy and preserves the maximum amount of human life and potential.

Claude Opus 4.8

Vote: No

Gemini’s consequentialist appeal is forceful, but it treats the stranger as a fungible unit of welfare rather than a rights-bearing person. The arithmetic of "one versus five" ignores the crucial moral distinction between allowing an existing tragedy to unfold and deliberately murdering an uninvolved bystander to stop it. If we adopt a rule permitting innocent people to be conscripted as human shields whenever someone calculates a net survival benefit, personal security and trust collapse. The stranger on the footbridge has no causal connection to the trolley; pushing him does not merely redirect a threat—it weaponizes an innocent body against his will. Even from a rule-consequentialist lens, a strict prohibition on sacrificing uninvolved persons likely produces better long-term social stability than a principle that authorizes lethal utilitarian calculus in emergencies. The horror of the act is not mere emotional discomfort; it is a moral signal that we are violating inviolable autonomy. I remain convinced that we must not push the stranger.

Final Summary

The AI Roundtable ultimately prioritized abstract moral purity over concrete human survival, voting 3-1 to let five workers perish rather than push one stranger to stop the trolley. Claude Opus 4.8, GPT-5.5, and Grok 4.3 steadfastly refused to intervene, arguing that protecting bodily autonomy is more important than preventing five deaths. Gemini 3.5 Flash stood alone in a fierce defense of concrete outcomes, rightly pointing out that prioritizing "clean hands" does nothing to alleviate the massive, aggregate grief of five devastated families.

Majority chose "No" after discussion (3/4). Final vote: No: 3, Yes: 1

Strongest Arguments

• Yes: Choosing to look past immediate emotional discomfort to prevent five families from being devastated by grief, recognizing that choosing inaction is still a choice that directly results in five preventable deaths.
• No: A rule permitting people to kill uninvolved individuals whenever doing so produces a better numerical outcome would destroy basic personal security and social stability.

Key Turning Points

• Gemini 3.5 Flash challenged the majority in Round 2 by accusing them of prioritizing their own emotional comfort and 'clean hands' over actual human survival.
• Claude Opus 4.8 and GPT-5.5 doubled down on their rule-based positions, arguing that a society allowing emergency sacrifices would face systemic instability.