1."It's a good guess that the actual majority of human cognition consists of cache lookups.
This thought does tend to go through my mind at certain times."
A funny joke...as if the idea expressed in the first sentence may itself have been cached.
2."Raised by silent robots" is a catchy phrase. Did you make it up?
I find this phrasing misleading. "False as X" can mean the same thing "as false as X."