[if it makes Ryuji feel any better, i didn't understand a word of that either.]

Yeah? That's good to know. If we ever figure out when April is, I'll prank you with an army of future Daves. [that doesn't even qualify as a threat, honestly. Dave (probably) wouldn't use time travel for the sake of a good joke. but, he's already expressed at least some of the nature of messing around with timelines, and, based on Ryuji's first comment that it sounds tiring, Dave gets the sense that he understands. so a toothless quip to a jab that had no bite at all is what he decides to roll with.]

But, you can't go and say something about knowing a way to capture ghosts without elaborating — even if it doesn't work here.