Nnnot really. The Time-Turner, certainly, but that doesn’t make the story uninstantiable. Making a logical impossibility a basic plot premise… sounds like quite an interesting challenge, but that would be a different story.
A spell that lets you get a number of objects that is an integer such that it’s larger than some other integer but smaller than it’s successor, used to hide something.
And SCP-033. And related concepts in Dark Integers by Greg Egan. And probably a bunch of other places. I’m surprised I couldn’t find a TVtropes page on it.
Nnnot really. The Time-Turner, certainly, but that doesn’t make the story uninstantiable. Making a logical impossibility a basic plot premise… sounds like quite an interesting challenge, but that would be a different story.
A spell that lets you get a number of objects that is an integer such that it’s larger than some other integer but smaller than it’s successor, used to hide something.
This idea (the integer, not the spell) is the premise of the short story The Secret Number by Igor Teper.
And SCP-033. And related concepts in Dark Integers by Greg Egan. And probably a bunch of other places. I’m surprised I couldn’t find a TVtropes page on it.