Thinking about the brain

Chris Chatham kicked off a lively discussion with 10 Important Differences between Brains and Computers.

(Developing Intelligence is on my feed reader, but I got tipped off to this by George Siemens’ elearnspace.)
Some of the comments come from people with a lot of brain knowledge, some from people with a lot of computing knowledge.

I’m always inclined to think we know less than we think we do, and so I found the last paragraph striking:

225,000,000,000,000,000 (225 million billion) interactions between cell types, neurotransmitters, neuromodulators, axonal branches and dendritic spines, and that doesn’t include the influences of dendritic geometry, or the approximately 1 trillion glial cells which may or may not be important for neural information processing.

And somehow that brings to mind a line from Matt Ridley’s Genome:

The fuel on which science runs is ignorance. Science is like a hungry furnace that must be fed logs from the forests of ignorance that surrounds us. In the process, the clearing we call knowledge expands, but the more it expands, the longer its perimeter and the more ignorance comes into view.