Why the mind uses shortcuts
Attention, time, and working memory are limited. The mind has to compress information, rely on familiar patterns, and make reasonable guesses. Those shortcuts are often useful, but they can become systematically misleading when the situation changes or important evidence is missing.
Where bias can enter
A bias can affect what gets noticed, what is remembered, how causes are explained, which evidence feels credible, and which option feels safest. The distortion may happen before deliberate reasoning begins, which is why a conclusion can feel obvious even when the path to it was incomplete.
Bias does not mean every judgment is wrong
A biased process can still reach a correct conclusion, and an unbiased process can still be mistaken. The useful question is not simply whether the answer is right. It is whether the same evidence and standards would produce the same judgment if the framing, source, identity, or outcome changed.