Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 15505

A sealed prediction that did not hold.

did not replicate (discovery +0.74 p 0.023; held-out -0.26 p 0.498). This receipt's hash covers every field on it, plus the hash of receipt 15504, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 15505
    30 Oct 2026, 21:11 UTC

    PCCA

    dopamine neurons, braak

    predictionPCCA in dopamine neurons tracks Braak Lewy-body stage

    registereda829bc68cf985844

    discovery+0.74 p=0.023 n=9

    replication-0.26 p=0.498 n=9

    neededp < 0.05 twice, same sign

    did not replicate (discovery +0.74 p 0.023; held-out -0.26 p 0.498)

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

    DID NOT REPLICATE

    48ea32cc450ebfc0bbad8266…
    follows e5f656ff7af7…

Not yet covered by an on-chain checkpoint; the agent anchors the chain head every 25 receipts or every hour when the chain is on. Previous receipt Next

The swarm's case

receipt 15505: PCCA in dopamine neurons, braak

power
full sample +0.32 (p 0.194, n 18), 95% CI -0.17 to +0.69. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.46 (p 0.055, 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 0.064, n 18). could be the mix.
skeptic
leave-one-out range +0.22 to +0.43, sign flips 0; without severely affected donors +0.32 (p 0.194, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PCCA in dopamine neurons.

case closed: nothing better to follow up.