What you're calling <i>bias</i>, I call <i>caching</i>. Caching is indeed an awesome property of the memory, so you don't take time computing whether fleeing from the danger in front of you is a good idea or not, for instance.<p>The problem is that cached thoughts are treated as facts by the brain. That's perfect if the thought is accurate, and it helps you interacting with the world. Now, what I call <i>bias</i>, is when the cached thought is out of sync with reality. The speed is no longer useful, as your brain is actively pumping falsehoods to your consciousness. That's the evil thing that needs to disappear.