 Quite generally, given that good intentions are intentions to act well or “do the right thing”, we may say that practical wisdom is the knowledge or understanding that enables its possessor, unlike the nice adolescents, to do just that, in any given situation. The detailed specification of what is involved in such knowledge or understanding has not yet appeared in the literature, but some aspects of it are becoming well known. Even many deontologists now stress the point that their action-guiding rules cannot, reliably, be applied without practical wisdom, because correct application requires situational appreciation—the capacity to recognise, in any particular situation, those features of it that are morally salient. This brings out two aspects of practical wisdom.