Board Thread:The Panopticon/@comment-43908-20150311013943/@comment-4028641-20150827222534

Oh, hardly. The many different incarnations of the Doctor aren't caused by confused timelines and schewed reality. They're just different writers going a bit crazy with what they can get away with at the time. If two different stories introduce two different Ninth Doctors or two different Tenth Doctors, we do not combine them because well technically...

Once again, we have two incarnations who do not look the same, do not act the same, and do not follow the same timeline. The creators say they are not the same. Nothing suggests that they're the same. So they're not.