Man is not logical and his intellectual history is a record of mental reserves and compromises. He hangs on to what he can in his old beliefs even when he is compelled to surrender their logical basis.
I know when I was growing up in New York, whenever I turned on the television, I never saw a face that looked like me. Whenever there was an Asian person on television, it would be a huge event, me calling to my older sister 'There's an Asian person on television!' It was unheard of back then.