This question popped up a few minutes ago and its premise has no foundational basis in anything.
No really. "If the Earth were to spin the other way, could gravity exist?"
This is such a complete non-sequitur, so I am unsure how to handle it. None of the flagging or closing options seem to apply here (beyond "other"), yet it seems to me that this question is...not appropriate for Worldbuilding. It's not a bad question though (aside from the poor English due to non-native speaker, on the surface the question is fine), it's just that it is blatantly wrong.
Aside from down-voting and commenting, how should such a question be handled?