It is my belief that many, if not most, people believe themselves to having never changed their opinion, even though they have done so many times. To admit to yourself that you once were wrong is to admit that you were imperfect; it is easier to believe that you have always thought what you currently believe.

And, consequently, if you have never changed opinions, your current understanding of things must therefore be correct and unchanging, and policy can be written and implemented with this assumption.

In a way, it is the antithesis of science.