 deeply modeled we practice doing it over and over again we don't consider turning left on our way to work if we always turn right we don't wonder what is going on the left of us because it's irrelevant we've learned that it's irrelevant and at a social level we've learned that some topics are irrelevant they're not that important to us some people are irrelevant or not that important to us and even when we're talking to someone we know and have some affiliation with