sorePutting legal definitions aside, at what age do you think someone can really be considered an adult?
For the most part, I think a person should be considered an adult when they show the emotional and psychological maturity of an adult. I've seen 30-year-olds who act like kids, and I've seen 16-year-olds who act like responsible, mature adults.
I'll never tell where I fall into this mix, of course. :)