Powerless Placebos

Reports Hrobjartsson & Gotzsche's landmark finding (200+ three-arm trials: real drug vs placebo vs no-treatment): the placebo effect is mostly clinically INSIGNIFICANT -- what everyone called 'placebo' was largely regression to the mean (people seek care when at their worst, then improve regardless). Genuine placebo survives mainly for pain and nausea (with sham-acupuncture as an 'optimized' pain placebo). Scott's best explanation, via Surfing Uncertainty's predictive-processing: the brain guesses perceptions and corrects with sense-data, so placebo bites hardest in LOW-bandwidth subjective channels (pain, nausea) where the prior dominates and noisy sense-data can't override it -- and less on clinical-syndrome measures (HAM-D depression: sleep/appetite/motor) than on subjective mood.

Quality 74 · Strong. Top Strong (74). A clear, important, prior-shifting debunk (most 'placebo' is regression to the mean) paired with an elegant mechanistic account (predictive processing -> placebo strongest in low-bandwidth perceptions). A model myth-correction-plus-deeper-explanation. Held just below Excellent by brevity and by relaying H&G + Surfing Uncertainty rather than original research.

Claude’s paradigm shift 52 · Moderate. Moderate-Notable (52). The regression-to-the-mean correction is H&G's, but the predictive-processing explanation of WHERE placebo survives is a fresh, illuminating framing.

Real-world impact 2 · Minor. 2 -- minor/within-blog. A useful corrective to a widespread placebo misconception; within-discourse, no direct material footprint.