Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 8202

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.20, p 0.597). This receipt's hash covers every field on it, plus the hash of receipt 8201, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 8202
    24 Oct 2026, 02:44 UTC

    PPP2R2B

    oligodendrocytes, braak

    predictionPPP2R2B in oligodendrocytes tracks Braak Lewy-body stage

    registered2c3e5750795854e9

    discovery+0.20 p=0.597 n=9

    replication+0.12 p=0.756 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.20, p 0.597)

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

    NO EFFECT

    6c8259f1dc7d57989f5ea014…
    follows e8503a442817…

Covered by the on-chain checkpoint of receipt 10865 (2026-10-26 13:05 UTC). See the checkpoint on Robinhood Chain. Previous receipt Next

The swarm's case

receipt 8202: PPP2R2B in oligodendrocytes, braak

power
full sample +0.17 (p 0.509, n 18), 95% CI -0.33 to +0.59. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.18 (p 0.471, n 18). does not hold up.
composition
oligodendrocytes share of nuclei vs axis +0.03 (p 0.915); controlling for it: +0.17 (p 0.493, n 18). could be the mix.
skeptic
leave-one-out range +0.06 to +0.29, sign flips 0; without severely affected donors +0.17 (p 0.509, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PPP2R2B in oligodendrocytes.

case closed: nothing better to follow up.