Th[e] strategy [of preferring less knowledge and intelligence due to their high cognitive costs] is exemplified by the sea squirt larva, which swims about until it finds a suitable rock, to which it then permanently affixes itself. Cemented in place, the larva has less need for complex information processing, whence it proceeds to digest part of its own brain (its cerebral ganglion). Academics can sometimes observe a similar phenomenon in colleagues who are granted tenure.
Nick Bostrom
It is perhaps worth noting that a similar comment was made by Dennett:
“The juvenile sea squirt wanders through the sea searching for a suitable rock or hunk of coral to cling to and make its home for life. For this task, it has a rudimentary nervous system. When it finds its spot and takes root, it doesn't need its brain anymore, so it eats it! It's rather like getting tenure.”
...in 1991 or so.
Another month has passed and here is a new rationality quotes thread. The usual rules are: