Quiz: The Zombie Idea
Target: 70% or higher to proceed confidently.
Section 1: Multiple Choice (1 point each)
1. A "zombie idea" is best defined as: - A) An idea nobody believes anymore - B) A wrong idea that has been debunked yet persists in practice - C) An idea from the distant past - D) A controversial idea with supporters on both sides
Answer
**B)** The defining feature is persistence despite debunking — the idea has been killed by evidence but refuses to stay dead. *Reference:* Section 16.12. The five structural features of zombie ideas are: - A) Age, complexity, controversy, funding, and fame - B) Intuitive appeal, usefulness to powerful interests, institutional embedding, narrative stickiness, and simplicity - C) Authority, evidence, methodology, replication, and publication - D) Political support, media coverage, celebrity endorsement, commercial backing, and cultural tradition
Answer
**B)** These five features operate independently of evidence — which is why evidence alone can't kill the zombie. *Reference:* Section 16.23. Learning styles has the highest zombie resilience because: - A) The evidence against it is weak - B) It activates all seven persistence mechanisms simultaneously at high intensity - C) Teachers are uniquely susceptible to false beliefs - D) It has never been properly debunked
Answer
**B)** All seven mechanisms active = maximum resilience. The evidence against it is strong (multiple systematic reviews); the persistence is structural. *Reference:* Section 16.34. The chapter argues zombie ideas persist partly because personal experience is: - A) Always more reliable than research - B) Systematically biased in the zombie's favor through survivorship and confirmation biases - C) Irrelevant to scientific questions - D) More important than evidence
Answer
**B)** Cases that confirm the zombie are vivid; cases that disconfirm it are invisible. Experience feels like the strongest evidence but is actually the weakest for zombie evaluation. *Reference:* Section 16.5Section 2: True/False with Justification (1 point each)
5. "Zombie ideas can be killed by presenting stronger evidence."
Answer
**False.** Evidence targets only the evidential basis of the zombie. The five structural features (intuitive appeal, powerful interests, institutional embedding, narrative stickiness, simplicity) are non-evidential — they maintain the idea independently of evidence. Killing a zombie requires addressing the structural features, not just the evidential basis.6. "The persistence engine that maintains zombie ideas also maintains correct knowledge."
Answer
**True.** The persistence engine cannot distinguish between correct and incorrect established knowledge. The same forces (sunk cost, enforcement, institutional embedding) that maintain zombies also maintain the vast body of correct knowledge. This is why the engine cannot simply be disabled — it performs a valuable function alongside its pathological one.Section 3: Short Answer (2 points each)
7. Explain why the interaction effects between persistence mechanisms make zombie resilience exponential rather than linear.
Sample Answer
Each active mechanism reinforces others: sunk cost creates investment that enforcement protects; incentives fund the precision tools that make the zombie look scientific; Einstellung prevents seeing alternatives that complexity hiding keeps invisible. These interactions mean that each additional mechanism doesn't just add to resilience — it multiplies the effectiveness of all other active mechanisms. A zombie with 5 mechanisms is not 2.5x more resilient than one with 2 — it's qualitatively more resistant because the mechanisms form a self-reinforcing system.Section 4: Applied Scenario (3 points)
8. A professional association in your field endorses a practice that systematic reviews have found to be ineffective. The practice is embedded in certification requirements, taught in training programs, and commercially supported by an industry of practitioners and product manufacturers. Apply the zombie diagnostic: score the eight mechanisms, identify the structural features, and recommend a correction strategy.
Sample Answer
Scoring: (1) Sunk cost: HIGH (certification, training, careers). (2) Replication: Unclear (may have been adopted before adequate testing). (3) Incentives: HIGH (industry profits, practitioner livelihoods). (4) Precision: Moderate (assessment tools may create false precision). (5) Einstellung: HIGH (trained practitioners can't see alternatives). (6) Enforcement: HIGH (challenging the practice challenges the professional association). (7) Complexity: HIGH (the truth is probably "it depends" rather than "it works/doesn't work"). (8) Zombie features: Intuitive (yes), powerful interests (yes), embedded (yes), sticky narrative (probably), simple (yes). Score: 7-8/8. Strategy: (1) Replace, don't just debunk — identify evidence-based alternatives that satisfy the same professional need. (2) Target institutional embedding — work with the professional association to revise certification requirements. (3) Prebunk new trainees — ensure training programs teach the evidence alongside the practice. (4) Be patient — generational turnover may be required. (5) Fund the transition — support practitioners who need to retrain.Scoring & Next Steps
| Score | Assessment | Recommended Action |
|---|---|---|
| < 50% | Needs review | Re-read 16.1–16.3 |
| 50–70% | Partial | Review the zombie resilience matrix and the five features |
| 70–85% | Solid | Ready to proceed to Part III |
| > 85% | Strong | Proceed to Chapter 17 — you've completed Part II |