Originally posted by: CapsuleCorpJX
Its really hard to tell what exactly the Sharingan can copy, and at what level sharigan needs to be to copy certain things.
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I kinda see things as the Sharingan can see everything. Hows its done. In theory he can see how everything is done.
But he's been called a genius, because he has the ability to copy it and use it effeciently within a short time.
Same for Sasuke. However bloodline limits are a different matter.

The Sharingan has to do with a little of Genjetsu, Kinda like reading the fellows mind or telling him what you are trying to do. But Knowing and doing something different. Thats where Sasuke,Itachi and Kakashi are considered Geniuses