Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 8203

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.16, p 0.685). This receipt's hash covers every field on it, plus the hash of receipt 8202, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 8203
    24 Oct 2026, 02:44 UTC

    PPP2R2B

    dopamine neurons, braak

    predictionPPP2R2B in dopamine neurons tracks Braak Lewy-body stage

    registered1264be3a298713bd

    discovery+0.16 p=0.685 n=9

    replication+0.16 p=0.685 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.16, p 0.685)

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

    NO EFFECT

    8234aeb720715c01e4360fe6…
    follows 6c8259f1dc7d…

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 8203: PPP2R2B in dopamine neurons, braak

power
full sample +0.17 (p 0.498, n 18), 95% CI -0.32 to +0.59. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.21 (p 0.393, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: +0.15 (p 0.544, n 18). could be the mix.
skeptic
leave-one-out range +0.06 to +0.33, sign flips 0; without severely affected donors +0.17 (p 0.498, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PPP2R2B in dopamine neurons.

case closed: nothing better to follow up.