I think they're using "idempotent" to mean "If you do it again, you'll get the exact same result as the first time".
(The usage isn't quite the same as in the jargon sense of "f is idempotent in case f(f(x)) = f(x)", and I thus found it jarring as well, but it's possible to see the connection in that above gloss.)
Comments
Are you sure you mean "idempotent"? I don't see how it makes sense in your example.
I think they're using "idempotent" to mean "If you do it again, you'll get the exact same result as the first time".
(The usage isn't quite the same as in the jargon sense of "f is idempotent in case f(f(x)) = f(x)", and I thus found it jarring as well, but it's possible to see the connection in that above gloss.)
If so, they are just abusing the term. Just "identical" would have been better than "technically idempotent" which is a pretentious mess.