Study Guide: Chapter 13 — Choices

Core Idea

Arrow/Condorcet impossibility results are real but misapplied: they assume choice means aggregating fixed preferences. Rational decision-making is problem-solving — creating options and criticizing errors. Good institutions optimize error-correction, not representational fidelity.

Key Terms

Arrow's theorem · error-correction (political) · choice as problem-solving · Popper's question

Case Summary

Popper's reframing: not "who should rule?" but "how to remove bad rulers/policies without violence?" Plurality systems may out-correct proportional ones.

Application Checklist

• [ ] Ask if your decision process measures preferences or removes bad decisions fast
• [ ] Stop treating preferences as fixed inputs — they're improvable conjectures
• [ ] Find your cheapest mechanism to reverse a wrong decision

Self-Test

1. Why do the impossibility theorems misfire on democracy?
2. What is Popper's reframed founding question of politics?
3. Why can "fair representation" lose to error-correction?