Underlined is not only an assumption, it goes against the context nor does it make any sense whatsoever. Madara's literal words were "full potential". Literally has nothing to do with the number of abilities. "Full" doesn't refer to a filled cup when used in the statement "Full Power". Full Power=Strongest Power. That simple.
Madara stated his full power was PS. Clear example.
Wrong.
-Yes. Obito referred to Madara's statement when he said that you need both Sharingan to unleash their true power.
-Not sure where the "Madara implied he was talking about his sharingan part" came from when there was no implication. It was an outright statement.
-They are talking about Sharingan.
-He points to his right eye. (Sharingan)
-Says he needs a left eye (Sharingan)
-Says that the reason for that is because both eyes together unleashes their true potential.
-Madara did "correct" Obito, but he clearly didn't do it in the way you are saying he did. He didn't correct him by saying that Rinnegan shows it's true power when both eyes are together, not the Sharingan. He corrected him by saying that the eye in question at the moment is the Rinnegan, not the Sharingan.
Not sure why you are deliberately changing up the quote here. He stated "No, it's not a Sharingan, it's a Rinnegan". Which further proves my point.
1. Madara tells Obito he'll get his left Rinnegan eye back.
2. Obito then replies by asking him if he's interested, and then tells him that the Sharingan shows it's true power when both eyes are together.
3. Madara, who was talking about Rinnegan from the start, tells Obito that it's not a Sharingan, that it's a Rinnegan. "IT" refers to the Rinnegan eye in Obito's head. THAT is what Madara was referring to.
4. Obito replies by saying that he was talking about his set of Mangekyo, not the Rinnegan.
You keep telling me that Madara corrected Obito by saying that Sharingan doesn't show it's true power with both eyes, but that is obviously not what he was correcting. He was talking about Rinnegan. Obito mentioned Sharingan. Madara thought Obito meant to say Rinnegan. Obito was actually referring to Sharingan.
Then there's the fact that Madara already clearly stated that Sharingan shows it's true power when both eyes are together. Your premise makes zero sense for the sole fact that we'd have to assume Madara was lying when he told Obito this tidbit of information, and we have to assume that despite Madara "correcting Obito by telling him the Sharingan doesn't show it's true power with both eyes", Obito carries on with his statement, hence "No, I mean this". Not sure why you are saying he referred to Kamui alone when he was obviously referring to the full set of eyes. The context can't be clearer.
-The whole chapter is even called Two Mangekyo.
-Despite the "correction", once again, Obito carries on and says that he's referring to his two MS. If Madara was correcting him on what you think he was correcting him on, then Obito wouldn't have said "No, I mean this".
-Madara already stated that the Sharingan show their true power together, which should've ended this debate.
-Obito says he needs to reach Kakashi since their eyes will work better as a pair.
