In the previous post, I listed seven principles of bias. Some people were apparently wondering what the point of all this is. There are two applications that I can think of. One is that, when assessing someone's opinion, it is useful to know the extent to which they are biased. We often do not have time or expertise to explore and analyze issues for ourselves, and we must rely on others. And even if we are analyzing the issue ourselves, we may by relying on others to a certain degree. If we know them to be fundamentally biased, this should make us more cautious about relying upon what they say.