Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 8618

A sealed prediction that did not hold.

no effect in discovery (spearman rho -0.26, p 0.493). This receipt's hash covers every field on it, plus the hash of receipt 8617, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 8618
    24 Oct 2026, 12:00 UTC

    PPIG

    dopamine neurons, braak

    predictionPPIG in dopamine neurons tracks Braak Lewy-body stage

    registereda0308af6128ec2e4

    discovery-0.26 p=0.493 n=9

    replication+0.33 p=0.393 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho -0.26, p 0.493)

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

    NO EFFECT

    caa4a2f4dd8700c38355b0da…
    follows e3c804b1fc7d…

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 8618: PPIG in dopamine neurons, braak

power
full sample +0.04 (p 0.881, n 18), 95% CI -0.44 to +0.50. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.01 (p 0.962, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.08 (p 0.761, n 18). could be the mix.
skeptic
leave-one-out range -0.08 to +0.14, sign flips 5; without severely affected donors +0.04 (p 0.881, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PPIG in dopamine neurons.

case closed: nothing better to follow up.