For the Thinking Man.

[Heywood]

instinct ,in a purely biological sense ,doesn't exist in humankind.

Everyone is a blank slate at birth.

Everyone is a product of their environment and education [upbringing]

At some point the ego develops which leads into the psychic progression enabling social coexistence .

All my kids, when they were new born, If I put my finger in their hands they would curl their fingers around mine, as if they were grabbing my finger.

I didn't need to teach them to do this. Apparently their slates were not clean as they knew how to do this from the moment they were born. I'm pretty sure that instincts are part of the human makeup. I had to teach them not to pull my finger by farting everytime they did though.