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Off topic here, but CAST is one of my favourite topics. CAST is one reason why I think co-existing dumb AIs are a bigger risk than the singularity. CAST is also how I look at information flows around parts of a complex system - there are particular patterns that helps you segment the system and thus understand it more easily. For example, thinking about a database diagram as a CAST meant it was easy to quickly derive rules for where to look for the conceptual objects first time I looked at a diagram and then point out where problems might occur.
It's an extremely helpful conceptual tool. Equilibriums, dampening effects, amplifying effects - all good stuff.

Dumb AI's are indeed a bigger risk, I call dumb AI's the beast system. :)

Once the human becomes the ghost in the machine, it's over for the human.

(((They))) salivate over this.

Ray is one of my heroes. I tend towards cautiously thinking he is probably correct. He is at least correct enough that we should try to create the minds as he says and see where that leads us. The journey will teach us a lot even though I don't think the destination will be where we think.
There are some big research hurdles to even contemplate what Ray is proposing though. We're only just starting to work with AI that feeds back into itself (e.g. RNNs) previously our neural networks were sense-responses machine that worked in one direction only. And, we have engineering problems dealing with things at the scales needed to pull off Ray's brain simulation. But yeah, let's give it a shot.