Defining Intelligence, from Nigel Davies
I like GM Miguel Najdorf's definition of intelligence; the speed with which someone is able to change his mind about something. But it strikes me that this may be mainly a trait that can be acquired via education.
There seem to be two major parts to this process:
1. Having enough curiosity to look for alternatives.
2. Being able to admit you were wrong about the previously held view.
This leads on to a possible definition of an 'educational environment', i.e. a place which is able to foster these two.