DeepMind, Hinton, et al are still convinced that the brain must be doing something like backprop. See Lillicrap address all common objections to backprop in th

DeepMind, Hinton, et al are still convinced that the brain must be doing something like backprop. See Lillicrap address all common objections to backprop in the brain: https://www.youtube.com/watch?v=vbvl0k-aUiE&ab_channel=ELSCVideo https://www.youtube.com/watch?v=vbvl0k-aUiE&ab_channel=ELSCV... Also from their paper Backpropagation in the brain: "It is not clear in detail what role feedback connections play in cortical computations, so we cannot say that the cortex employs backprop-like learning. However, if feedback connections modulate spiking, and spiking determines the adaptation of synapse strengths, the information carried by the feedback connections must clearly influence learning!"