There is a minute physics video:
https://www.youtube.com/watch?v=owPC60Ue0BE
That shows that it is not possible to clone things using a proof by contradiction.
In the video; they talk about Superposition, Composite systems and the property of Transformation Distribution.
Eventualy, they arrive at the statement: $A^2+B^2=A^2+B^2+2AB$. At this point it is established that because $A^2+B^2\nequl A^2+B^2+2AB$ there is a contradiction.
However one may note that the above has a solution (namely A=B=0). I am aware that an event with 0 probability wont exist; but what I am confused about is why …