We call the brain's internal capabilities Intelligence. It is convenient to give a similar name to all of the external influences, cultural or otherwise, that affect the evolution of the brain, and with it, the mind. We shall call these influences Extelligence. Mind is not just intelligence plus extelligence, its inside and outside, so to speak. Instead, mind is a feedback loop in which intelligence influences extelligence, extelligence influences intelligence, and the combination transcends the capabilities of both. Terry Pratchett/Ian Stewart/Jack Cohen - The Science of Discworld
You don't need to be intelligent to work that out! And a brain is only something with which we think that we think.
We call the brain's internal capabilities Intelligence. It is convenient to
give a similar name to all of the external influences, cultural or otherwise,
that affect the evolution of the brain, and with it, the mind. We shall call
these influences Extelligence. Mind is not just intelligence plus
extelligence, its inside and outside, so to speak. Instead, mind is a feedback
loop in which intelligence influences extelligence, extelligence influences
intelligence, and the combination transcends the capabilities of both.
Terry Pratchett/Ian Stewart/Jack Cohen - The Science of Discworld