Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 4009

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.54, p 0.130). This receipt's hash covers every field on it, plus the hash of receipt 4008, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 4009
    20 Oct 2026, 07:50 UTC

    PDCD6IP

    dopamine neurons, braak

    predictionPDCD6IP in dopamine neurons tracks Braak Lewy-body stage

    registered8506216a814730e2

    discovery+0.54 p=0.130 n=9

    replication+0.40 p=0.288 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.54, p 0.130)

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

    NO EFFECT

    62c8a891fe3b2598aca64e08…
    follows 897660a539fb…

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 4009: PDCD6IP in dopamine neurons, braak

power
full sample +0.51 (p 0.029, n 18), 95% CI +0.06 to +0.79. the interval excludes zero: something may be there, smaller than a half can see.
confounder
adjusted for sex: +0.54 (p 0.019, n 18). holds up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: +0.50 (p 0.035, n 18). not the mix.
skeptic
leave-one-out range +0.45 to +0.66, sign flips 0; without severely affected donors +0.51 (p 0.029, n 18). robust.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PDCD6IP in dopamine neurons.

case closed: nothing better to follow up.