Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 7915

A sealed prediction that did not hold.

did not replicate (discovery -0.74 p 0.021; held-out -0.09 p 0.820). This receipt's hash covers every field on it, plus the hash of receipt 7914, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 7915
    23 Oct 2026, 20:58 UTC

    PRKCA

    dopamine neurons, braak

    predictionPRKCA in dopamine neurons tracks Braak Lewy-body stage

    registered3af89803a66b4ff7

    discovery-0.74 p=0.021 n=9

    replication-0.09 p=0.820 n=9

    neededp < 0.05 twice, same sign

    did not replicate (discovery -0.74 p 0.021; held-out -0.09 p 0.820)

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

    DID NOT REPLICATE

    92f131467e8bd892c7d1da18…
    follows 04cabec6e29e…

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 7915: PRKCA in dopamine neurons, braak

power
full sample -0.31 (p 0.214, n 18), 95% CI -0.68 to +0.19. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.38 (p 0.120, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.44 (p 0.070, n 18). could be the mix.
skeptic
leave-one-out range -0.48 to -0.22, sign flips 0; without severely affected donors -0.31 (p 0.214, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PRKCA in dopamine neurons.

case closed: nothing better to follow up.