Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 4230

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.04, p 0.924). This receipt's hash covers every field on it, plus the hash of receipt 4229, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 4230
    20 Oct 2026, 12:50 UTC

    CHN1

    dopamine neurons, braak

    predictionCHN1 in dopamine neurons tracks Braak Lewy-body stage

    registered9f200bebe5dabfa8

    discovery+0.04 p=0.924 n=9

    replication+0.08 p=0.839 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.04, p 0.924)

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

    NO EFFECT

    e2c5807c6c2e0efa9e82efff…
    follows ac1b9c30f773…

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 4230: CHN1 in dopamine neurons, braak

power
full sample +0.57 (p 0.014, n 18), 95% CI +0.14 to +0.82. the interval excludes zero: something may be there, smaller than a half can see.
confounder
adjusted for sex: +0.58 (p 0.011, n 18). holds up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: +0.63 (p 0.0049, n 18). not the mix.
skeptic
leave-one-out range +0.51 to +0.65, sign flips 0; without severely affected donors +0.57 (p 0.014, n 18). robust.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for CHN1 in dopamine neurons.

case closed: nothing better to follow up.