Board Thread:Versus Debates/@comment-26958911-20151010214426/@comment-26537507-20151022232846

Did he understand what had happened to Kabuto though? As far as I remember, KAbuto explained his new powers a little bit, and did a 'this is why you can't win speech', then it was back to fighting until Kabuto's 'feel bad for me backstory'. Unless Kabuto specifically told them how sage mode worked, I don't see how else Itachi could learn the ins and outs of it. Either way, this is before that fight.