Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 4376

A sealed prediction that did not hold.

did not replicate (discovery -0.78 p 0.013; held-out -0.10 p 0.802). This receipt's hash covers every field on it, plus the hash of receipt 4375, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 4376
    20 Oct 2026, 16:06 UTC

    XYLB

    dopamine neurons, braak

    predictionXYLB in dopamine neurons tracks Braak Lewy-body stage

    registeredff72ac3d5154a773

    discovery-0.78 p=0.013 n=9

    replication-0.10 p=0.802 n=9

    neededp < 0.05 twice, same sign

    did not replicate (discovery -0.78 p 0.013; held-out -0.10 p 0.802)

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

    DID NOT REPLICATE

    d6f12257e724db47b8e1f979…
    follows e198efbe3b3d…

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 4376: XYLB in dopamine neurons, braak

power
full sample -0.36 (p 0.145, n 18), 95% CI -0.71 to +0.13. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.37 (p 0.132, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.45 (p 0.059, n 18). could be the mix.
skeptic
leave-one-out range -0.48 to -0.27, sign flips 0; without severely affected donors -0.36 (p 0.145, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for XYLB in dopamine neurons.

case closed: nothing better to follow up.