 The third reason for philosophers to be cautious about adapting work on the Big Five to the study of moral character is also methodological. On at least one way of understanding the Big Five taxonomy, it classifies people, not on the basis of whether they have traits like extraversion or not, but rather on the basis of the degree to which they have these traits. In other words, it assumes that everyone has the trait of extraversion, and the main question is only to what extent a given individual comes out on the extraversion scale. What goes for extraversion also applies to introversion. Everyone has that trait too.