Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 8832

A sealed prediction that did not hold.

did not replicate (discovery -0.74 p 0.023; held-out -0.18 p 0.635). This receipt's hash covers every field on it, plus the hash of receipt 8831, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 8832
    24 Oct 2026, 16:55 UTC

    TPCN2

    dopamine neurons, braak

    predictionTPCN2 in dopamine neurons tracks Braak Lewy-body stage

    registered785cf52d6722ee31

    discovery-0.74 p=0.023 n=9

    replication-0.18 p=0.635 n=9

    neededp < 0.05 twice, same sign

    did not replicate (discovery -0.74 p 0.023; held-out -0.18 p 0.635)

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

    DID NOT REPLICATE

    a7b8c6beae84d727c7495b2b…
    follows 4b177cdd739f…

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 8832: TPCN2 in dopamine neurons, braak

power
full sample -0.43 (p 0.075, n 18), 95% CI -0.75 to +0.05. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.44 (p 0.067, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.62 (p 0.0060, n 18). not the mix.
skeptic
leave-one-out range -0.57 to -0.36, sign flips 0; without severely affected donors -0.43 (p 0.075, n 18). robust.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for TPCN2 in dopamine neurons.

case closed: nothing better to follow up.