We are born and I believe we have inherited something, the rest you have to learn. What is intelligence and how do you define it?  I dont know and I dont care any more.  I could read at 4 and spoke 2 languages at 5 and then something happened in my life and I just stood still. eventually I got some  really  good teachers, and they could unravel my mind, it hurt and was not pleasant at all because I also went to Psychologists  and more. Now 60 years later I get by pretty well-