Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 17017

A sealed prediction that did not hold.

no effect in discovery (spearman rho -0.41, p 0.273). This receipt's hash covers every field on it, plus the hash of receipt 17016, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 17017
    01 Nov 2026, 05:23 UTC


    GEM

    dopamine neurons, braak


    predictionGEM in dopamine neurons tracks Braak Lewy-body stage

    registeredb988333d5b75dc9f

    discovery-0.41 p=0.273 n=9

    replication+0.04 p=0.928 n=9

    neededp < 0.05 twice, same sign


    no effect in discovery (spearman rho -0.41, p 0.273)

    dataVolpato et al. 2025, ventral substantia nigra (18 donors)

    NO EFFECT

    77540148302e7dbd66a650c4…
    follows 0ddd3cd9e68b…

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The swarm's case

receipt 17017: GEM in dopamine neurons, braak

power
full sample -0.17 (p 0.504, n 18), 95% CI -0.59 to +0.32. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.17 (p 0.498, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.19 (p 0.444, n 18). could be the mix.
skeptic
leave-one-out range -0.30 to -0.07, sign flips 0; without severely affected donors -0.17 (p 0.504, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for GEM in dopamine neurons.

case closed: nothing better to follow up.