I mean I don't see why geometric algebra bears on the factual existence of column-like structure perpendicular to the cortical surface in real brains. Geometric

I mean I don't see why geometric algebra bears on the factual existence of column-like structure perpendicular to the cortical surface in real brains. Geometric algebra may bear on what those columns do, but it is not relevant to whether the columns exist. This is a matter of observing network wiring from brain preparations.