Good questions. Im not sure that I can honestly say what defines anyone as old but as for being wise, I would say that the person's actions and words or in some cases the person's silence will either give the impression of wisdom or foolishness depending on the circumstances. As for the perception of the young, I would say that it isnt likely that any young person below the age of 40 would be seen by the majority of the people as being wise unless extraordinary circumstances were a factor simply because we as a society have been brainwashed over the years to think that only the elderly can have wisdom but whether the majority of the people see it as so or not, that doesnt mean that a young person, even one as young as 6 or 7 couldnt possess wisdom beyond her or his years. Perhaps even younger. Do you actually have a point to make or are you just being a troll ?