Originally Posted by Naruto2008
Well it was never stated that Kakashi knows Tobi is Madara, but Kakashi did see his sharingan and the level of Madaras space/time ninjutsu surpasses the 4ths. So we are assuming that Kakashi at least has an idea about who he is.
Okay, I think I kinda get your point here. Tobi used space/time ninjutsu better than the 4th Hokage and it comes to the point that there is only one person who is better then the 4th Hokage at space/time ninjutsu?
And that's Uchiha Madara then? Okaaay....
I think Kakashi will know... in due time and surely he'll tell... (I think)