>>10946478Yes, but it's unlikely someone younger than 16 would ever be mature enough.
18, as
>>10946504 said, is a cut off age. Basically, it's an age where enough people aren't too retarded to be trusted with their decisions.
It's probably more like a curve though - you'd have people fine at 14 and people who shouldn't be adults until 24. However, due to hormones and human growth patterns, I believe it's unlikely for many people to be mature before 16~ish. 18 might be a little conservative, but going for less would probably be risky. (again, this last paragraph is just my opinion on the matter)