(Conversely, many fictions are instantiated somewhere, in some infinitesimal measure. However, I deliberately included logical impossibilities into HPMOR, such as tiling a corridor in pentagrams and having the objects in Dumbledore's room change number without any being added or subtracted, to avoid the story being real anywhere.)
In the library of books of every possible string, close to "Harry Potter and the Methods of Rationality" and "Harry Potter and the Methods of Rationalitz" is "Harry Potter and the Methods of Rationality: Logically Consistent Edition." Why is the reality of that books' contents affected by your reticence to manifest that book in our universe?
Absolutely; I hope he doesn't think that writing a story about X increases the measure of X. But then why else would he introduce these "impossibilities"?
Here's the new thread for posting quotes, with the usual rules: