Everyone has hidden biases. Often we don’t recognize them because they sneak into our minds when we’re not paying attention. Similar to more overt biases, they surface when triggered by particular stimuli.
Example: I met with a new client who was convinced that feedback she had received was inaccurate. After asking a few questions, it was clear that she had some misconceptions about the person who provided the feedback. By dismissing the feedback (because of her hidden bias about the source), she missed some insight that was beneficial for her.