Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 4929

A sealed prediction that did not hold.

did not replicate (discovery -0.93 p 3.2e-4; held-out -0.16 p 0.680). This receipt's hash covers every field on it, plus the hash of receipt 4928, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 4929
    21 Oct 2026, 04:15 UTC

    MYO7A

    dopamine neurons, braak

    predictionMYO7A in dopamine neurons tracks Braak Lewy-body stage

    registered4782856d0be96c48

    discovery-0.93 p=3.2e-4 n=9

    replication-0.16 p=0.680 n=9

    neededp < 0.05 twice, same sign

    did not replicate (discovery -0.93 p 3.2e-4; held-out -0.16 p 0.680)

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

    DID NOT REPLICATE

    ad8bf8997f70bf1c480dbc73…
    follows 9a360d3de980…

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 4929: MYO7A in dopamine neurons, braak

power
full sample -0.39 (p 0.105, n 18), 95% CI -0.73 to +0.09. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.41 (p 0.091, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.48 (p 0.046, n 18). not the mix.
skeptic
leave-one-out range -0.56 to -0.32, sign flips 0; without severely affected donors -0.39 (p 0.105, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for MYO7A in dopamine neurons.

case closed: nothing better to follow up.