Loihi - Latest Update, page-140

From previous article...

""The brain is a great exemplar for computer architects in this brave new endeavor of machine intelligence. But the strengths and weaknesses of silicon are very different to those of wetware. We have not copied nature's pattern for flying machines, nor for surface locomotion, nor for engines, because our engineering materials are different. So, too, with computation.

For example, most neuromorphic computing projects advocate communication by electrical spikes, like the brain. But a basic analysis of energy efficiency immediately concludes that an electrical spike (two edges) is half as efficient for information transmission as a single edge, so following the brain is not automatically a good idea. I think computer architects should always strive to learn how the brain computes, but should not strive to literally copy it in silicon."

The devil's advocate.