Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 1642

A sealed prediction that did not hold.

did not replicate (discovery -0.75 p 0.020; held-out -0.29 p 0.445). This receipt's hash covers every field on it, plus the hash of receipt 1641, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 1642
    18 Oct 2026, 02:58 UTC

    APH1A

    dopamine neurons, braak

    predictionAPH1A in dopamine neurons tracks Braak Lewy-body stage

    registered98df8a2cb4e1f271

    discovery-0.75 p=0.020 n=9

    replication-0.29 p=0.445 n=9

    neededp < 0.05 twice, same sign

    did not replicate (discovery -0.75 p 0.020; held-out -0.29 p 0.445)

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

    DID NOT REPLICATE

    6e578b1078be4b764768c2ac…
    follows 6733e3631c46…

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 1642: APH1A in dopamine neurons, braak

power
full sample -0.52 (p 0.028, n 18), 95% CI -0.79 to -0.07. the interval excludes zero: something may be there, smaller than a half can see.
confounder
adjusted for sex: -0.48 (p 0.043, n 18). holds up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.52 (p 0.026, n 18). not the mix.
skeptic
leave-one-out range -0.60 to -0.45, sign flips 0; without severely affected donors -0.52 (p 0.028, n 18). robust.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for APH1A in dopamine neurons.

case closed: nothing better to follow up.