"...incredibly difficult to untangle the effects of culture from those of biology..." followed a few sentences later immediately by dismissal of consideration that "the age of brain structure maturation is determined by which toys a child plays with".
Sigh.
Honest question: do you even read what you fucking write?
change it to "incredibly difficult in general" in the first sentence to get at the poster's real meaning.
And the attitude of your post is completely out of line for HN. I'm getting really sick of people with the attitude of "I'm right so I can verbally abuse people who are wrong". You should be ashamed of yourself for writing like that.
Sigh.
Honest question: do you even read what you fucking write?