“One of the biggest misconceptions people have about intelligence is seeing it as some kind of unbounded scalar stat, like height. "Future AI will have 10,000 IQ", that sort of thing. Intelligence is a conversion ratio, with an optimality bound. Increasing intelligence is not so much like "making the tower taller", it's more like "making the ball rounder". At some point it's already pretty damn spherical and any improvement is marginal."

The brilliant Alan Turing did not himself seem convinced of his own articulateness or quickness on his feet, and yet he was one of the leading mathematicians, computer scientists, logicians, and cryptographers of his time. He was very good at processing information at levels that did not correspond to the skills we use to generate charming casual conversations.

- Tyler Cowen and Daniel Gross