Moral Cognition: Trolley Problems, Double Effect, and Dual-Process Theory

Switch Dilemma (Keen to flip the switch?)

• Core question: Would you pull a switch to redirect a trolley, saving five people but killing one?
• Intuition aligns with intent: you are intentionally taking a life by pulling the switch, even if it’s for the greater good. If you do nothing, that outcome is framed as fate.
• Moral takeaway: there is a sense of moral responsibility for the act of killing when you actively choose it.
• A useful takeaway from the discussion: inaction is not necessarily morally neutral; choosing not to act can still be a decision with consequences.
• Practical reflection: people often resist action because of hesitation or fear about what to do; the “bad option” is still a choice, and delay can lead to worse outcomes.
• Numerical framing:
  • If you flip the switch, you save 5 and kill 1.
  • Net lives saved: \text{net}_{\text{switch}} = 5 - 1 = 4.
• Real-life analogue: inaction as a form of responsibility; the decision to act versus not act is ethically charged.

Footbridge Dilemma (Judith Jarvis Thompson, 1976)

• Setup: You’re on a footbridge above the tracks. A large, strong man stands on the bridge. The trolley will kill five innocent workers unless you push the large man off the bridge to stop the trolley; the man will die, but five lives will be saved.
• Question: Would you push the large man off the bridge?
• Responses show a stark difference from the switch case:
  • More people say yes to flipping the switch than to pushing the man off the bridge.
• Key point: the calculation in terms of net lives is the same (save five, kill one → net 4), yet moral intuitions differ due to direct physical contact and perceived ownership of the harm.
• Explanations for the difference:
  • Direct physical action feels more morally charged than switching a lever.
  • Perceived personal responsibility is higher when you are actively causing harm.
  • Some participants view the situation as a question of onus or blame for the fatal outcome.
• Participant discussion snippets:
  • Some indicate that in the switch case they’d act; in the bridge case they wouldn’t.
  • Debates about whether there is an onus on the fat man to jump, or on you to sacrifice yourself.
• Variants and considerations:
  • The setup uses a large person to ensure stopping the trolley, not because of self-sacrifice or altruism, but to keep the problem within the single-act framework.
  • If the person on the bridge were smaller or unable to stop the trolley, the ethical dynamics shift.
• Conceptual takeaway: switch vs bridge prompts examination of harm, agency, and moral responsibility in direct contact scenarios.

History and Origins of the Problem

• Philippa Foot (1967): The trolley problem is rooted in the Doctrine of Double Effect in Catholic theology, which examines when unintended consequences may be morally permissible.
• Double Effect principle: if you perform an action with good intent, an unintended bad outcome may not render you morally responsible for that bad outcome.
• Abortion example (Foot): If removing a uterus is needed to save a woman's life, the pregnancy termination may be morally permissible under the double effect, since the primary intent is saving the mother's life.
• The trolley problem was used to illustrate nuances in moral reasoning and to challenge simplistic ethical rules.
• Judith Jarvis Thompson (1976): Introduced the footbridge version as a separate thought experiment to test differences between indirect versus direct harm when making moral decisions.
• Terminology in lecture: switch dilemma (Foot’s original) versus footbridge dilemma (Thompson's variation).

Related Thought Experiments and Variations

• Other thought experiments widely discussed in class:
  • Imagined scenarios where five people need organs and one person is a perfect organ match; would it be permissible to kill the matched person to save the five?
  • Variations with whether those in need are strangers, criminals, or have particular roles (e.g., teachers, leaders).
  • Scenarios involving children vs. the elderly; workers on the tracks vs. passersby; other social roles.
• Purpose of variations: to probe how people’s judgments shift when the identities, relationships, and perceived worth of individuals change.
• Classroom note: these variations reveal how moral reasoning can be sensitive to context and salience, not just to numerical outcomes.

Neurocognition and the Ethics of Trolley Problems

• Joshua Green (2001): Uses fMRI to study how brains respond to switch vs. footbridge cases.
• Core finding: emotion-related brain areas light up when people say no to the footbridge or when they reject harming; executive-function areas light up when people deliberate about the switch or push decisions.
• Brain regions discussed:
  • Emotion-related: amygdala; ventromedial prefrontal cortex (vmPFC).
  • Executive/Reasoning: dorsolateral prefrontal cortex (DLPFC); anterior cingulate cortex (ACC).
• Interpretation:
  • Deontological judgments (duty-based, rules) tend to be associated with automatic/emotional processing (System 1).
  • Consequentialist judgments (outcome-based, utilitarian) tend to be associated with deliberate reasoning (System 2).
• Dual-process framework: two interacting systems
  • System 1: fast, automatic, emotion-driven, intuitive responses.
  • System 2: slow, deliberate, calculation-driven, planful reasoning.
• Practical takeaway: the trolley problem illustrates a robust interaction between emotion and reason in moral decision making.
• Caveats:
  • The distinction is a descriptive account of how people think, not a prescription that one system is morally superior.
  • The naturalistic fallacy warning: just because our brains default to automatic or manual modes does not imply one mode is universally better for ethical decision making.
• Conceptual metaphor used by Green:
  • The brain as a camera with automatic settings (System 1) and manual settings (System 2); sometimes automatic settings yield correct moral judgments, sometimes manual settings are needed for nuanced cases.
• Additional context:
  • The debate includes concerns about whether human decision making should rely on intuition or reasoning in ethical contexts.
• Related literature and resources (as provided in the lecture): accessible articles by Green aimed at general audiences.

Mathematical and Conceptual Summaries

• Net life calculation in trolley scenarios:
  • \text{net}_{\text{switch}} = 5 - 1 = 4
  • \text{net}_{\text{footbridge}} = 5 - 1 = 4
• Dual-process framing: System 1 vs System 2 is not a value judgment but a description of cognitive modes (automatic/emotional vs deliberate/reasoned).
• The ethical problem: the distinction between intention (deontological emphasis) and outcomes (consequentialist emphasis).

Real-World Relevance and Media Connections

• The Good Place (TV show):
  • The trolley problem is used to illustrate moral decision making; the show consulted a philosophy professor at UCLA.
  • The show has multiple episodes that humanize these ethical dilemmas and connect philosophical ideas to narrative plots.
  • Note on availability: the show was leaving Netflix; students are encouraged to watch over a break for further connections.
• Self-driving cars and Moral Machine:
  • Interactive website/projects ask users to make decisions in trolley-like scenarios for autonomous vehicles.
  • Scenarios vary: pedestrians vs occupants, pregnant woman vs doctor, elderly person vs cat, etc.
  • The tool reveals common intuitions about how to prioritize lives and the tension between moral rules and outcomes.
• Real-life case study: Navy SEALs in Afghanistan (2006, Marcus Luttrell story):
  • Dilemma: tie up or kill goat herders who could reveal the team vs. let them go and risk an attack.
  • The team voted to spare the goat herders; later, the unit suffered casualties.
  • Luttrell reports ongoing moral guilt; reflects on the complexity of real-world moral decision making where both options carry severe costs.
• Takeaway from case study:
  • Both intuitive and deliberative systems are natural; there may be no perfect solution.
  • Any decision may leave a residual moral voice from the alternative framework in the back of one's mind.

Implications for Ethics, Practice, and Teaching

• The trolley problem highlights the limits of rule-based ethics (deontology) versus outcome-based ethics (consequentialism).
• It shows the role of emotions in moral judgment, and how emotion and reasoning can support or conflict with each other.
• It cautions against the naturalistic fallacy: just because a cognitive system tends toward one type of judgment in familiar situations does not dictate the best ethical principle in novel or high-stakes contexts.
• It provides a framework for discussing emerging technologies (e.g., autonomous agents) and the ethical design choices they force.
• Practical class applications:
  • Encourage students to reflect on when intuition should guide action and when deliberate analysis is necessary.
  • Use neuroscience findings to discuss the strengths and limits of our moral cognition.
  • Explore how framing and context alter moral judgments.

Closing Reflections and Next Steps

• The spotlight project: students will apply these ideas to a practical assignment (details to follow in class).
• Suggested further study resources include: foundational texts by Foot and Thompson, Green’s neuroethics work, and interdisciplinary readings combining philosophy, psychology, and neuroscience.
• Encourage students to watch The Good Place episodes and to explore the Moral Machine site for hands-on engagement with these concepts.