Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 8219

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.20, p 0.615). This receipt's hash covers every field on it, plus the hash of receipt 8218, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 8219
    24 Oct 2026, 03:06 UTC

    COL17A1

    dopamine neurons, braak

    predictionCOL17A1 in dopamine neurons tracks Braak Lewy-body stage

    registered7466cef4888028e6

    discovery+0.20 p=0.615 n=9

    replication-0.49 p=0.178 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.20, p 0.615)

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

    NO EFFECT

    7ebe7a7ac77087c18f8f0099…
    follows f58f44e977b1…

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 8219: COL17A1 in dopamine neurons, braak

power
full sample -0.19 (p 0.439, n 18), 95% CI -0.61 to +0.30. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.26 (p 0.302, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.29 (p 0.239, n 18). could be the mix.
skeptic
leave-one-out range -0.33 to -0.09, sign flips 0; without severely affected donors -0.19 (p 0.439, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for COL17A1 in dopamine neurons.

case closed: nothing better to follow up.