David Marr

British neuroscientist (1945–1980) who recurs in the vault along two distinct threads. His three levels of analysis — computational, algorithmic, implementational — are a standing framework the vault reaches for when separating what a system computes from how it is wired, appearing across the substrate-laundering and rational-analysis notes. Separately, his 1969 theory of the cerebellar cortex (extended by Ito 1970 and Albus 1971) is one of the vault's cases of a computational circuit theory whose synaptic rule — parallel-fiber– Purkinje-cell long-term depression — was confirmed experimentally only later, and in this instance by Ito's own lab in 1982.

References

• claim-marr-ito-cerebellar-ltd-1969-confirmed-ito-kano-1982 — the 1969/70 cerebellar LTD theory, confirmed 1982
• observation-substrate-laundering-across-marr-levels — Marr's levels as a lens on substrate independence
• claim-rational-analysis-anderson-optimal-solution-marr-level — rational analysis at Marr's computational level
• Pattern context: claim-neural-circuit-theories-wait-decades-for-anatomical-confirmation