How would that be possible? There was one John, now there are two. Since there weren't two before, when the guy used his machine, one of them was created. Even if they are completely identical, one wasn't around before the weapon/machine was used on John, so one would have to be the new John, not the original. It doesn't really matter if they ever call one the original, its just a weird idea which is probably going to be a big thing for awhile.
Don't think of it as copied, think of it as split, except unlike the ST:TOS transporter accident (One dark side, one light side), nothing was lost in either Crichton
One Day I hope to be the Man my Cat thinks I am
Where are we going? And why are we in this Handbasket?