Well Fitz says gods are just powered people with ego problems so if this god, who ultimately rules here is just someone with vast power that we don't understand, then this is just a world, like any of ours.

Once. [He sighed.] Once we were all put in a town where we believed we had always lived, we believed we were family with each other, people had jobs and went to school. Only a few months ago Barbas put us all in a school and people believed they were students. [Had this man been there for that, or arrived just after?]

If they can do that, then we can't trust anything we think we can remember from before we came here.