I agree, pretty much our every interaction is full of biases. Not only that, but &quot;bias&quot; is just what we call wrong guesses! We go through life assigning likelihoods to things, because it&#x27;s useful to know that a stove is more likely than a kitchen counter to burn you (even if it&#x27;s not on), a road is more likely to require caution than a pavement, men are more likely to be able to lift heavy weights than women, etc.<p>I still haven&#x27;t been able to pin down what bias is, but I&#x27;d say preliminarily, &quot;adhering to the initial judgement for someone even after getting evidence to the contrary&quot;. I can&#x27;t rationally discount that X group of people is more likely to do Y (it would be irrational to claim that all groups of people have exactly the same statistical properties), but if you think that <i>a specific person</i> does Y just because you think their group does Y, even after you&#x27;ve seen that they don&#x27;t, then you&#x27;re biased.