Board Thread:Theories and Speculation/@comment-32742265-20180119154238/@comment-734582-20180211084231

LoneNinja wrote: I never stated nor argued that you need to know a nature release. I only stated, you can't use a copied jutsu if you do not possess the physical ability to perform that said jutsu. I think there's a misunderstanding here.

The Sharingan can analyze anything it sees, and through analysis, copy it. That doesn't mean that the user can perform it. Madara had copied pretty much all of Hashirama's jutsu, but it wasn't until he had acquired Wood Release that he could use them.

The notion of the Sharingan as a copy eye (even though it's in the name) is a wrong one. It's not that it automatically copies things, but rather that it analyzes what it sees and gives virtually perfect memory, so that even decades later the technique can be used the moment it is accessible.

Similarly, Sasuke copied Lee's movies, but it wasn't until he had trained physically that he could really do them.