Thing is, it's impossible to clone anything with perfection.

  If a clone was made of you RIGHT NOW it would cease being you
  the moment the first bit of input came.

  You see with your eyes. He sees through his.

  From that moment on, all is different.

  We're basically state-systems. A poor analogy is computers. Do
  you know WHY there are so many software bugs in computers?

  Computers are simple state systems. No two computers are EVER IN
  THE SAME STATE.

  It's simply not possible. In a gross way they're similar, but
  some bugs are nearly impossible to duplicate because the exact
  states cannot be reproduced precisely.