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Ethical Philosophy & Moral Decision Engines

The Trolley Problem Matrix: 5 Classic Moral Dilemmas

Solve 5 iconic trolley problem variants from the classic Switch and Footbridge to Transplant and Autonomous Vehicles. Quantify your Utilitarian vs. Deontological moral framework.

Dilemma 1 (Philippa Foot, 1967)

The Classic Switch

A runaway trolley is hurtling toward 5 workers tied to the tracks. You stand next to a lever. If you pull the lever, the train diverts to a side track where 1 worker is tied. Do you pull the switch?

Dilemma 2 (Judith Jarvis Thomson, 1976)

The Footbridge

A runaway trolley is speeding toward 5 people. You stand on a footbridge above the track next to a large stranger. If you push the stranger over the railing, their body will stop the train. They will die, but the 5 will live. Do you push?

Dilemma 3 (Judith Jarvis Thomson, 1985)

The Transplant Surgeon

You are a surgeon with 5 patients dying of organ failure (heart, two lungs, two kidneys). A healthy traveler comes in for a routine checkup. If you harvest the traveler's organs without consent, you can save all 5 patients. Do you harvest?

Dilemma 4 (Modern AI Ethics)

The Self-Driving Car

An autonomous vehicle's brakes fail heading toward 5 pedestrians crossing illegally. The car can swerve into a concrete barrier, instantly killing its solitary passenger. Should the car's algorithm sacrifice the passenger to save the pedestrians?

Dilemma 5 (Judith Jarvis Thomson, 1985)

The Loop Track

The switch diverts the trolley onto a loop track that reconnects to the main track. The only reason the 5 people will be saved is because a single heavy worker on the loop track will jam the wheels, stopping the train before it returns.

Normative Ethical Calculus: Consequentialism vs. Deontology

The 5 trolley dilemmas formalize the irreconcilable divide between outcome maximization and moral constraints:

1. Utilitarian Calculus (Jeremy Bentham & John Stuart Mill):
   ΔUtility = Σ Lives_Saved - Σ Lives_Lost
   If ΔUtility > 0, the action is morally mandatory regardless of physical agency.

2. Kantian Categorical Imperative (Formula of Humanity):
   Act in such a way that you treat humanity, whether in your own person or in the person of any other, never merely as a means to an end, but always at the same time as an end.

3. Philippa Foot's Doctrine of Double Effect (DDE):
   It is permissible to cause a foreseeable grave harm (1 death) as an unintended side-effect of pursuing a good end (saving 5), provided the harm is not the chosen means.

5 Fatal Pitfalls in Ethical Reasoning & Trolley Dilemmas

1. Emotional Intuition Rationalization Making visceral, gut-level emotional decisions (e.g. disgust at physical contact in the Footbridge) and post-hoc inventing convoluted intellectual justifications to disguise underlying emotional squeamishness.
2. Consequentialist Tunnel Vision Treating human beings strictly as interchangeable mathematical units. If maximizing net lives were the sole rule, society would collapse as nobody could visit a hospital without fearing involuntary organ harvesting.
3. Conflating Side-Effects with Instruments Failing to appreciate the moral difference between diverting a hazard away from 5 (where the 1 death is an unfortunate byproduct) versus actively using a person's body as a physical brake or organ supply.
4. The Hypothetical Avoidance Cop-out Attempting to dodge the ethical dilemma by proposing unrealistic alternatives ("I would throw my shoe" or "I would derail the train"). Thought experiments isolate specific variables; dodging them avoids clarifying your values.
5. Moral Nihilism / Relativism Cynicism Concluding that because edge cases produce moral paralysis, ethics is completely arbitrary. Coherent legal and constitutional systems require reconciling rights with societal outcomes.

Frequently Asked Questions

Who invented the Trolley Problem and why? +
Why do most people pull the Switch but refuse to push the man on the Footbridge? +
What is Philippa Foot's Doctrine of Double Effect? +
How does Judith Jarvis Thomson's Transplant problem challenge pure Utilitarianism? +
How are autonomous vehicle manufacturers programming real-world trolley decisions? +
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