The reason that I made my comment is that the article tries to say that a deficiency in facial recognition of persons of another race is a psychological - that is, higher cognitive - effect. If it is taken as an effect of higher cognition, without a neurophysiological basis, opens up the possibility of the argument "his bias against black people made him not care enough to distinguish black people." That argument would bring open the door to arguments sociologically based biases such as being racist, when in fact there is an observed, known, studied, published, fact that the neurophysiology of the part of the brain that distinguishes faces literally cannot distinguish variations in facial features of members of a race a person hasn't been often exposed to, as a literally biological limitation that one cannot blame on sociological reasons. It has the potential to shift the conversation to a fruitless arena.