I've never heard of Remnant, for starters.

[ and he's confident in what he knows in terms of basic geography. imagine the rest! it will unfortunately fall on ears that wouldn't be able to make any sense of it. jayce taps the metal of his brace after giving the last few bolts a finalizing squeeze. ]

Interspacial travel is possible. And if it's possible, there's a way it could be reverted.