Stereotype treat is an inseparable factor of diversity. I believe that regardless of how much we try to keep our opinions unbiased, we all can remember times that we judge others just by what they wear, how they look, what gender they have, what nationality they are, and so on.
The hidden Brain article mentioned that our brain can be set on “pilot” and “auto-pilot”. It is so true but the point is that: does “pilot” mode means full control of our thinking? I don’t think so. I believe that if stereotype poisoned our brain in any shape, it would affect our behavior somewhere and sometime. It could even show itself in reverse form. Try to recall a time when any of us tried to compensate a common stereotype by leaning toward the other side and gave more credit to that group even in our mind.
In some aspects, our brain is likened to a computer’s memory. There is always ways to retrieve data from your PC, even though you had deleted that. It doesn’t really matter that you don’t want to recall data and try hard to forget them, they are somewhere in there!