I recently got into a bit of a debate/discussion with friends as to what could be considered the threshold for biological adulthood. I was of the mind that reproductive potential was a fairly accurate benchmark, but some people argued that simply marks the beginning of adolescence and that adulthood occurs much later.
Is there a right answer as far as biology is concerned? Legally, socially, societally, I know that it varies by country and state, but I wondered if adolescence was considered a kind of early adult state. I am also of the mind that adolescence is a relatively new biological and social concept. Any input whatsoever would be greatly appreciated, if only to sate my curiosity.