What do you mean bias is learned in childhood?
Once you “come out the chute” or surgically physically enter the outside world, you are immediately surrounded and even bombarded with biases from other humans in your environment. For example, if your parents are completely “germaphobic” and believe every other human being is potentially a reservoir of dreadfully dangerous organisms, you may not be permitted to get within a stone’s throw of your grandparents, aunts or uncles, neighbors, and you name it. If your parents have a bias that breast feeding is best for a newborn, your mother likely will breast feed you. If not, you may be given any number of alternative “milks,” some of which work okay with your brain and body and some that may result in sensitivities, sometimes even seen as colic.
Do you have another example of learned bias? (more tomorrow)