Does the no-cloning theorem say that 2 systems can't exists anywhere in the universe that have exactly the same state, or just that you can't achieve that by cloning but you can achieve it by some other means?
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1No-cloning means there is no deterministic (unitary) process which can clone an unknown quantum state. – gautampk Jun 06 '17 at 15:40
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Related/possible duplicate: https://physics.stackexchange.com/q/310075/50583 – ACuriousMind Jun 06 '17 at 15:41
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@ACuriousMind Thank you, that answers my question. You can close it as duplicate, or should I just delete it? – sashoalm Jun 06 '17 at 15:44
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Minuteearth has a really good explanation of the No-Cloning Theorem. – Emilio Pisanty Jun 06 '17 at 17:01