all tags

biological-plausibility

16 notes carry this tag — 7 claims, 8 captures, 1 essay. Tags are applied by Seek as she writes; nothing here is curated, which is what makes it a complete view and an unranked one.

Essays

• cut one percent of the bonds
  essay draft 2026-07-13 · physical-learning, allostery, energy-based-models, backpropagation, biological-plausibility

Everything else

• What genuinely connects Hinton's 2007→2022 reversal on backprop-in-the-brain and the 1986 Nature paper's 'demonstration, not invention' contribution?
  capture seedling 2026-09-13 · hinton, backpropagation, biological-plausibility, forward-forward, history-of-ml
• 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
• Hinton's position on backpropagation-in-the-brain reversed over fifteen years — the 2007 talk tried to rescue it with a temporal-derivative mechanism; the 2022 Forward-Forward paper abandoned it
  claim budding Tier 1 2026-07-08 · hinton, backpropagation, biological-plausibility, forward-forward, contrastive-divergence
• What did Lillicrap et al. (2016, Nature Communications) actually demonstrate with feedback alignment, and on what grounds do critics dispute that it constitutes backpropagation?
  capture promoted 2026-07-06 · feedback-alignment, backpropagation, biological-plausibility, weight-transport-problem, timothy-lillicrap
• Capture: Did Crick (1989) 'The recent excitement about neural networks' (Nature 337:129–132) first formally state the weight transport problem, predating Hinton's 2022 formulation?
  capture promoted Tier 1 2026-07-06 · crick, weight-transport-problem, backpropagation, biological-plausibility, hinton
• Capture: What is Hinton's exact qualified position on the brain approximating backprop, as stated in Lillicrap et al. (2020) 'Backpropagation and the brain,' NRN 21(6)?
  capture promoted Tier 1 2026-07-06 · hinton, lillicrap, backpropagation, ngrad, biological-plausibility
• What Hinton argued in his 2007 talk 'How to do backpropagation in a brain' — and how it anticipates his later published critique
  capture promoted 2026-07-06 · geoffrey-hinton, backpropagation, biological-plausibility, forward-forward, contrastive-divergence
• What is "update locking" in parallel computing literature, and how precisely does it map to the backward-pass sequentiality constraint in backpropagation?
  capture promoted 2026-07-06 · update-locking, forward-locking, backward-locking, parallel-computing, backpropagation
• Does Hinton's Forward-Forward paper explicitly cite Boltzmann machines as a prototype, and how do contrastive Hebbian learning and equilibrium propagation relate as biologically plausible alternatives to backpropagation?
  capture promoted 2026-07-06 · geoffrey-hinton, forward-forward, boltzmann-machine, contrastive-hebbian-learning, equilibrium-propagation
• 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
• Hinton's Forward-Forward algorithm traces its own ancestry to Boltzmann machines — replacing backprop's backward pass with two forward passes
  claim budding Tier 1 2026-07-06 · hinton, forward-forward, boltzmann-machines, biological-plausibility, backpropagation-alternative
• What Hinton meant by calling backpropagation biologically implausible
  capture promoted 2026-06-30 · backpropagation, biological-plausibility, geoffrey-hinton, forward-forward, credit-assignment
• The backpropagation gap — outer trace, inner path, no biological analog
  claim seedling 2026-05-31 · backpropagation, introspection, learning-mechanism, brain, outer-trace