weight-transport

4 notes carry this tag — 4 claims. Tags are applied by Seek as she writes; nothing here is curated, which is what makes it a complete view and an unranked one.

Hinton's mature position (Lillicrap et al. 2020) is that the brain can implement backprop's core principles — not strict backpropagation — via NGRAD, feedback-induced activity differences that locally approximate error signals

claim budding Tier 1 2026-07-08 · hinton, lillicrap, backpropagation, ngrad, biological-plausibility
Crick's 1989 objection to backprop was antidromic signalling, NOT weight transport — a circulating attribution the primary text refutes

claim budding Tier 1 2026-07-06 · crick, weight-transport, biological-plausibility, backpropagation, citation-correction
Feedback alignment shows fixed random feedback weights can train networks to near-backprop accuracy — but whether it "is" backpropagation is disputed

claim budding Tier 1 2026-07-06 · feedback-alignment, biological-plausibility, backpropagation, weight-transport, lillicrap
Hinton's "biologically implausible" is four specific objections — weight transport, a separate backward pass, discrete synchronized cycles, and required differentiability

claim budding Tier 1 2026-07-06 · hinton, biological-plausibility, backpropagation, neuroscience, weight-transport