Forum:KB:Revan

I'm sorry if I come across as stupid, but I've read the wiki page and can't find it.

It says that Darth Revan was 'reprogrammed', even though he's human. This just doesn't make sense to me, any help would be appreciated. This is probably going to make somebody angry, because it's probably in the wiki somewhere, but as I say, I've looked a few times and can't find it.