Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 6588

A sealed prediction that did not hold.

no effect in discovery (spearman rho -0.18, p 0.639). This receipt's hash covers every field on it, plus the hash of receipt 6587, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 6588
    22 Oct 2026, 16:00 UTC

    YKT6

    dopamine neurons, braak

    predictionYKT6 in dopamine neurons tracks Braak Lewy-body stage

    registered5777ce32020ad733

    discovery-0.18 p=0.639 n=9

    replication-0.20 p=0.613 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho -0.18, p 0.639)

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

    NO EFFECT

    4122bf2e969ede6f20478e63…
    follows 43574b6c7784…

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 6588: YKT6 in dopamine neurons, braak

power
full sample -0.14 (p 0.573, n 18), 95% CI -0.57 to +0.35. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.18 (p 0.476, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.23 (p 0.360, n 18). could be the mix.
skeptic
leave-one-out range -0.28 to -0.04, sign flips 0; without severely affected donors -0.14 (p 0.573, n 18). fragile.
cell type
strongest in OPCs: -0.60 (p 0.0089, n 18) vs -0.14 in dopamine neurons. proposing OPCs.
axis
no measure beats "tracks Braak Lewy-body stage" for YKT6 in dopamine neurons.

follow-up registered; not confirmed in substantia nigra, an independent cohort.
follow-up YKT6 · OPCs · braak: substantia nigra, an independent cohort (Parkinson's or LBD vs controls) -0.32 p 0.248 (needs p < 3.1e-4)