Quiz: Field Autopsy — Nutrition Science

Q: The Seven Countries Study was flawed primarily because: (a) The data was fabricated (b) Keys selected 7 of 22 available countries that supported his hypothesis, and confounding variables were not adequately controlled (c) The study was too small (d) The study was conducted in the wrong countries

(b) Selection bias (choosing countries that confirmed the hypothesis) and uncontrolled confounders (sugar, smoking, physical activity, processed food) were the primary flaws.

Q: Why are RCTs largely impractical in nutrition research? (a) They are too cheap to be taken seriously (b) Duration (chronic diseases take decades), compliance (people don't stick to assigned diets), ethics (can't randomize to suspected harm), and blinding (can't hide what you're eating) (c) The FDA prohibits nutrition RCTs (d) Researchers prefer observational studies

(b) All four barriers are structural features of the subject matter, not institutional failures.

Q: What is the "healthy user bias"? (a) The tendency for health researchers to eat healthy diets (b) People who follow dietary recommendations also tend to exercise more, smoke less, and have higher socioeconomic status — confounding the apparent effect of diet (c) The bias toward studying healthy populations (d) Users of health apps being more health-conscious

(b) Healthy user bias means the apparent benefit of a "healthy" diet may reflect the general health-consciousness of people who adopt it, not the diet itself.

Q: Approximately what percentage of nutrition research is industry-funded? (a) 5-10% (b) 20-30% (c) 50-70% (d) 90-100%

(c) Estimates of 50-70% (varying by definition). This creates systematic bias in which questions are studied, which findings are published, and which researchers are influential.

Q: The chapter describes nutrition science as "the field where every failure mode operates simultaneously." How many of the 16 major failure modes are identified as active in nutrition? (a) 5 (b) 8 (c) 12 (d) All 16

(d) The table in section 26.3 identifies all 16 major failure modes as active in nutrition — the full stack. No other field examined in the book exhibits this pattern.

Q: John Yudkin argued in the 1960s-70s that the primary dietary cause of heart disease was: (a) Dietary fat (b) Dietary cholesterol (c) Sugar (d) Protein

(c) Yudkin's Pure, White and Deadly (1972) argued that sugar was the primary dietary driver of heart disease. He was attacked by Keys and the sugar industry, his reputation was destroyed, and decades later the evidence increasingly supports his position.

Q: The 2015 reversal on dietary cholesterol illustrates which concept from the book? (a) Genuine correction (b) The revision myth — the error was corrected without acknowledgment, and the narrative became "the science evolved" rather than "we were wrong for 50 years" (c) Overcorrection (d) Crisis-driven correction

(b) The cholesterol reversal was implemented quietly, without acknowledging the scope of the error or its costs. This is the revision myth in real time.

Q: The "contradictory study problem" in nutrition is primarily caused by: (a) Scientists deliberately contradicting each other (b) Media distortion of clear findings (c) Observational methodology with unreliable measurement, massive confounding, and researcher degrees of freedom — noise masquerading as signal (d) Too little research funding

(c) The contradictory findings reflect real methodological weakness, not just media distortion. The same noisy data produces opposite conclusions depending on analytical choices.

Q: The Correction Speed Model predicts that nutrition science will correct: (a) Faster than medicine (b) At about the same rate as economics (c) Extremely slowly (50+ years) because every variable pulls toward slow (d) Quickly because the evidence against the fat hypothesis is now overwhelming

(c) Very low evidence clarity, very high switching cost, very high defender power, very low outsider access, low alternative availability, very low crisis probability, slow correction mode, and very low revision resistance all pull toward extremely slow correction.

Q: The chapter suggests that the most important thing nutrition science could do is: (a) Fund more studies (b) Be honest about what it doesn't know — acknowledging uncertainty rather than providing false certainty (c) Hire better researchers (d) Eliminate all industry funding

(b) The tension between intellectual honesty ("we don't know") and institutional survival (fields must provide actionable recommendations) is the deepest structural problem. Resolving it requires rethinking what nutrition science promises and what it can deliver.

Quiz: Field Autopsy — Nutrition Science

Q1. The Seven Countries Study was flawed primarily because:

(a) The data was fabricated (b) Keys selected 7 of 22 available countries that supported his hypothesis, and confounding variables were not adequately controlled (c) The study was too small (d) The study was conducted in the wrong countries

Answer

**(b)** Selection bias (choosing countries that confirmed the hypothesis) and uncontrolled confounders (sugar, smoking, physical activity, processed food) were the primary flaws.

Q2. Why are RCTs largely impractical in nutrition research?

(a) They are too cheap to be taken seriously (b) Duration (chronic diseases take decades), compliance (people don't stick to assigned diets), ethics (can't randomize to suspected harm), and blinding (can't hide what you're eating) (c) The FDA prohibits nutrition RCTs (d) Researchers prefer observational studies

Answer

**(b)** All four barriers are structural features of the subject matter, not institutional failures.

Q3. What is the "healthy user bias"?

(a) The tendency for health researchers to eat healthy diets (b) People who follow dietary recommendations also tend to exercise more, smoke less, and have higher socioeconomic status — confounding the apparent effect of diet (c) The bias toward studying healthy populations (d) Users of health apps being more health-conscious

Answer

**(b)** Healthy user bias means the apparent benefit of a "healthy" diet may reflect the general health-consciousness of people who adopt it, not the diet itself.

Q4. Approximately what percentage of nutrition research is industry-funded?

(a) 5-10% (b) 20-30% (c) 50-70% (d) 90-100%

Answer

**(c)** Estimates of 50-70% (varying by definition). This creates systematic bias in which questions are studied, which findings are published, and which researchers are influential.

Q5. The chapter describes nutrition science as "the field where every failure mode operates simultaneously." How many of the 16 major failure modes are identified as active in nutrition?

(a) 5 (b) 8 (c) 12 (d) All 16

Answer

**(d)** The table in section 26.3 identifies all 16 major failure modes as active in nutrition — the full stack. No other field examined in the book exhibits this pattern.

Q6. John Yudkin argued in the 1960s-70s that the primary dietary cause of heart disease was:

(a) Dietary fat (b) Dietary cholesterol (c) Sugar (d) Protein

Answer

**(c)** Yudkin's *Pure, White and Deadly* (1972) argued that sugar was the primary dietary driver of heart disease. He was attacked by Keys and the sugar industry, his reputation was destroyed, and decades later the evidence increasingly supports his position.

Q7. The 2015 reversal on dietary cholesterol illustrates which concept from the book?

(a) Genuine correction (b) The revision myth — the error was corrected without acknowledgment, and the narrative became "the science evolved" rather than "we were wrong for 50 years" (c) Overcorrection (d) Crisis-driven correction

Answer

**(b)** The cholesterol reversal was implemented quietly, without acknowledging the scope of the error or its costs. This is the revision myth in real time.

Q8. The "contradictory study problem" in nutrition is primarily caused by:

(a) Scientists deliberately contradicting each other (b) Media distortion of clear findings (c) Observational methodology with unreliable measurement, massive confounding, and researcher degrees of freedom — noise masquerading as signal (d) Too little research funding

Answer

**(c)** The contradictory findings reflect real methodological weakness, not just media distortion. The same noisy data produces opposite conclusions depending on analytical choices.

Q9. The Correction Speed Model predicts that nutrition science will correct:

(a) Faster than medicine (b) At about the same rate as economics (c) Extremely slowly (50+ years) because every variable pulls toward slow (d) Quickly because the evidence against the fat hypothesis is now overwhelming

Answer

**(c)** Very low evidence clarity, very high switching cost, very high defender power, very low outsider access, low alternative availability, very low crisis probability, slow correction mode, and very low revision resistance all pull toward extremely slow correction.

Q10. The chapter suggests that the most important thing nutrition science could do is:

(a) Fund more studies (b) Be honest about what it doesn't know — acknowledging uncertainty rather than providing false certainty (c) Hire better researchers (d) Eliminate all industry funding

Answer

**(b)** The tension between intellectual honesty ("we don't know") and institutional survival (fields must provide actionable recommendations) is the deepest structural problem. Resolving it requires rethinking what nutrition science promises and what it can deliver.

Scoring Guide

9-10 correct: Excellent. You understand nutrition's unique structural vulnerability.
7-8 correct: Good. Review the full failure mode stack (26.3) and the methodological problems (26.2).
5-6 correct: Fair. Revisit the authority cascade (26.1) and the Correction Speed Model (26.4).
Below 5: Re-read the chapter focusing on WHY nutrition is structurally different from other fields.