Paper 1 of a “Memory-Based Methods” series arguing that FFQ/24-hour-recall/diet-diary intake estimates are measurement-theoretically invalid and frequently physiologically implausible (e.g. reported energy intakes incompatible with survival at the reported body size), so any association computed from them — including egg-intake associations in the cohorts this analysis draws on — is uninterpretable rather than merely noisy. Recommends such self-report-derived data be excluded from causal inference and from dietary-guideline formulation.
relevance_note: The strongest-form FFQ-invalidity critique; if accepted, it undercuts the entire egg-cohort evidence base rather than favoring either side of the harm/benefit debate.