 Aristotle makes a number of specific remarks about phronesis that are the subject of much scholarly debate, but the (related) modern concept is best understood by thinking of what the virtuous morally mature adult has that nice children, including nice adolescents, lack. Both the virtuous adult and the nice child have good intentions, but the child is much more prone to mess things up because he is ignorant of what he needs to know in order to do what he intends. A virtuous adult is not, of course, infallible and may also, on occasion, fail to do what she intended to do through lack of knowledge, but only on those occasions on which the lack of knowledge is not culpable. So, for example, children and adolescents often harm those they intend to benefit either because they do not know how to set about securing the benefit or because their understanding of what is beneficial and harmful is limited and often mistaken. Such ignorance in small children is rarely, if ever culpable. Adults, on the other hand, are culpable if they mess things up by being thoughtless, insensitive, reckless, impulsive, shortsighted, and by assuming that what suits them will suit everyone instead of taking a more objective viewpoint. They are also culpable if their understanding of what is beneficial and harmful is mistaken. It is part of practical wisdom to know how to secure real benefits effectively; those who have practical wisdom will not make the mistake of concealing the hurtful truth from the person who really needs to know it in the belief that they are benefiting him.