Another (and much easier to discuss) symptom of the way our people identification circuitry specializes on the available samples is the disbelief when someone r

Another (and much easier to discuss) symptom of the way our people identification circuitry specializes on the available samples is the disbelief when someone remarks on similarities between our siblings or to our parents. In that special case, subtle differences usually ring much stronger with us than the blatant (and useless, for identification) similarities.