Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 5027

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.34, p 0.373). This receipt's hash covers every field on it, plus the hash of receipt 5026, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 5027
    21 Oct 2026, 06:24 UTC

    KLK6

    dopamine neurons, braak

    predictionKLK6 in dopamine neurons tracks Braak Lewy-body stage

    registeredb53e1694435946ca

    discovery+0.34 p=0.373 n=9

    replication+0.11 p=0.773 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.34, p 0.373)

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

    NO EFFECT

    6d78bf50785458102884cf26…
    follows a857467cb6ce…

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 5027: KLK6 in dopamine neurons, braak

power
full sample +0.24 (p 0.337, n 18), 95% CI -0.26 to +0.64. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.31 (p 0.214, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: +0.34 (p 0.161, n 18). could be the mix.
skeptic
leave-one-out range +0.14 to +0.42, sign flips 0; without severely affected donors +0.24 (p 0.337, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for KLK6 in dopamine neurons.

case closed: nothing better to follow up.