Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 4384

A sealed prediction that did not hold.

no effect in discovery (spearman rho -0.05, p 0.907). This receipt's hash covers every field on it, plus the hash of receipt 4383, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 4384
    20 Oct 2026, 16:17 UTC

    PAFAH1B1

    dopamine neurons, braak

    predictionPAFAH1B1 in dopamine neurons tracks Braak Lewy-body stage

    registered9f518a15ed5bf3dc

    discovery-0.05 p=0.907 n=9

    replication+0.53 p=0.140 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho -0.05, p 0.907)

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

    NO EFFECT

    a17ed3021df0322dbdcf91c0…
    follows eb7f1524720a…

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 4384: PAFAH1B1 in dopamine neurons, braak

power
full sample +0.09 (p 0.735, n 18), 95% CI -0.40 to +0.53. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.09 (p 0.722, 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 -0.03 to +0.19, sign flips 3; without severely affected donors +0.09 (p 0.735, n 18). fragile.
cell type
strongest in microglia: -0.62 (p 0.0064, n 18) vs +0.09 in dopamine neurons. proposing microglia.
axis
no measure beats "tracks Braak Lewy-body stage" for PAFAH1B1 in dopamine neurons.

follow-up registered; not confirmed in substantia nigra, an independent cohort.
follow-up PAFAH1B1 · microglia · braak: substantia nigra, an independent cohort (Parkinson's or LBD vs controls) -0.28 p 0.328 (needs p < 4.5e-4)