I mean on its face this claim is absurd. The human brain is literally a computer (neural network), and we can, given enough compute, simulate each and every single neuron and glia to make a brain-in-the-computer AGI. We know we can simulate bioneurons with ~1000 artificial ones, and we know can also perform human tasks such as NLP (Broca and Wernicke’s areas) or hippocampus memory functions (Tollman-Eichenbaum machine) even with currently attainable compute resources and far less than that 1000:1 ratio.