Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 3649

A sealed prediction that did not hold.

no effect in discovery (spearman rho -0.09, p 0.822). This receipt's hash covers every field on it, plus the hash of receipt 3648, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 3649
    20 Oct 2026, 00:32 UTC

    PITPNA

    dopamine neurons, braak

    predictionPITPNA in dopamine neurons tracks Braak Lewy-body stage

    registered5b655a1c0fcf2aae

    discovery-0.09 p=0.822 n=9

    replication-0.65 p=0.057 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho -0.09, p 0.822)

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

    NO EFFECT

    04520c1ae6caebf7d38672e6…
    follows e41b1c3bddc0…

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 3649: PITPNA in dopamine neurons, braak

power
full sample -0.35 (p 0.159, n 18), 95% CI -0.70 to +0.14. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.25 (p 0.310, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.45 (p 0.063, n 18). could be the mix.
skeptic
leave-one-out range -0.48 to -0.27, sign flips 0; without severely affected donors -0.35 (p 0.159, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PITPNA in dopamine neurons.

case closed: nothing better to follow up.