Board Thread:General Discussion/@comment-26346951-20150716173453/@comment-24674051-20150716205116

Here is the flaw of that particular plot.

If you kill Snow in the Past, Emma does not exist in the present. It's a variation on the grandfather paradox, and it is probably the most infuriating aspect of trying to deal with Time Travel.

Let's take it through the cycle. Snow has Emma, person has grudge against Emma travels back in time to kill Snow and succeeds. Emma is never born, person has no reason to have grudge, therefore has no reason to travel back in time to kill Snow, so does not. We're stuck in an endless cycle.

And don't even get me started on all the headaches of spinning up alternate dimensions and dimension hopping. That just gets ridiculous.

Belief has nothing to do with this. That basic plot line has is just riddled with holes, and almost every Sci-Fi/Fantasy writer in the world knows to tread these dangerous waters carefully, or better still not at all.