scifi.stackexchange has a peculiar scope. It tackles, as the name says, Science fiction and fantasy elements. However, these are usually distributed by Films, TV and Books.
For example, these two questions: Why is Avada Kedavra Considered Unblockeable? and Are Unforgiveable curses unblockeable in Harry Potter
They are essentially dupes of one another, (if you exclude the fact that on scifi book canocity supercedes), however they are on different stack exchanges, and both fit their respective scopes.
How should these questions be handled?