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I haven’t read the book but I am familiar with the thousand brains hypothesis. The real problem as far as I can tell seems to be the variations in morphology and connectivity of different neurons.
The brain might make every column the same to begin with but if that’s the case, the diversity of the initial columns is immense. So many different genes even for just pyramidal neurons. Not to mention the inter neurons and other glia.
Plus the function of many cells are still unknown like chandelier cells. They’re everywhere, they regulate firing, but we’re not sure how. They can be inhibitory or excitatory and sometimes they can fire in response to both inhibitory or excitatory input, Etc.
And don’t even get me started on how no one actually seems to agree on the function of the layers of the neocortex. Every paper I read on the topic poses almost entirely different hypotheses for the function of each layer and the few connection maps you can find will show many connections that violate the idea each layer takes specific inputs.
Sure spiking networks are much more biologically plausible (and fun to work with so I recommend you try one out if you’re interested in this field) but the connections and learning rules are what seems to matter more.