So that Mulan dipping sauce from McD’s was definitely real and not some weird collective false memory like that Sinbad genie movie sh**?

None of your rants make any sense. It was established ages ago in both the books and the series that prophecy was a legitimate power/force in this fictional world, and the kind of time meddling depicted in this episode logically follows from the presence of that kind of power/force. The concept of prophecy entails, by…