surements will inevitably have changed the positron’s spin. Going
back to the version of the experiment using the entangled electron
and positron, the same thing happens. For example, measuring the
electron’s spin has the ability to change thepositron’sspin, because
they’re entangled. The no-cloning theorem cannot possibly prohibit
makingentangledcopies, because then it would forbid entanglement
itself. Only makingseparablecopies inevitably leads to paradoxes.
Section 14.11 More about entanglement 1007