Twins' age and when they leave Hogwarts

[pengolodh_sc]

No: HPFGUIDX 43218

I hvae noticed in the recent Fred&George-debate that several refer to 
Fred&George as being adult, and some also have referred to them as 
having entered the workforce - I presume that entering the workforce 
means leaving Hogwarts.  But this puzzles me a bit, as I am under the 
very distinct impression that Fred and George have not finished their 
Hogwarts education, and that at the end of GoF, they had only 
concluded their sixth year at that institution.  The HP-Lexicon does 
seem to back me up on this.  I also do not think they will just leave 
Hogwarts now that they have received the 1000 Galleons from Harry - 
if nothing else, I suspect Molly Weasley would have a thing or two to 
say about it, and besides, 1000 Galleons would not be able to support 
them and support a new business.

Assuming I am right in that the twins still have one more year at 
Hogwarts, then I cannot support the assumption that they are adults, 
either.  Not in the legal way, at least - few countries, if any, have 
people reaching age of majority before they have finished the level 
of school they legally must finish.  That they are old enough that 
they should understand some things and be expected to show a given 
level of maturity is true, but the term adult to me implies legal 
adulthood, and I do not think they've come that far yet.

Best regards
Christian Stubø