Ok I see everyone thinking, again a Mangekyou Sharingan thread. I don't know if this is discussed in the theory section or something. But I was wondering about something.
Itachi seems to know quite a lot about the Sharingan, he knows what is needed to gain the Eternal Mangekyou Sharingan. I wonder, did he read this in the Uchiha Hideout or did Madara tell him?
If Madara told him that would be pretty stupid. Since Itachi with EMS could be a lot stronger then him. Itachi also said Madara is a lot weaker then he used to be. So I wondered, why would Madara have told Itachi this? He knew Sasuke was alive, so he left the possibility of Itachi gaining EMS and defeat him.
Is there a deeper reason for that?