The One One Loop Theory of Time Travel

"This is where it gets fun and crazy. And I'm gonna try not to make your nosebleed, but there's a few variations of this," he says. "I enjoy playing around with the concept of time travel to either figure out what does the universe have to be like in order for this to actually work?" He continues: "Because future me is coming back and telling me to do the thing to future me, I now know what to do when I'm future me."