"Okay, but now I'm curious, what does it mean? I- actually, I missed that completely, the first time, I suppose because I didn't understand you… Or, no, I'd thought it just meant 'area'." What could it possibly mean that you'd expect everyone to understand- or are they very isolated, somehow, despite all the trains and miles and miles of fields, so you really couldn't get to anywhere too different… no, probably not that…

"It's... the point that's closest to the 'top' of the planet that's in your house or city or whatever? I don't know how the top of the planet is defined, you have the north pole and... well it's tough to explain but everyone learns it in school and knows what it is! So you not even noticing that I used that word shows that... you're not from this planet..."

"…Huh, there's anything complicated there? Does, just, closest distance to the North Pole not work in some way I'm missing? Neat, though…" They look lost in thought for a moment, then restart speaking. "What I'm amazed by is how you can be sure that everyone on the planet understands that coordinate system. The planet is enormous — well, the one I know, — there's billions of people there, you can just barely expect them to be human because 'not that' isn't technologically possible yet-" They deeply breathe in, than out. "Sorry, got on my soapbox again, I meet so many schoolkids assuming stuff, they haven't yet learned not to… but I suppose, if this really is a different planet, you have good reasons for thinking that's actually true of yours. In that case I'm amazed in a completely different way. Genuinely so, how?" (Hey, what do you think, while they're waiting for a reply-)

(This… was in their intuitive space-of-possibilities, if barely. You were right to not dismiss those! I — still think putting as much weight on the possibilities that sound like interesting stories would lead one astray most of the time? But, much less sure now, if this does turns out to be true.

Their interlocutor does sound human, though? And everything else looks like the planet which they are used to — plants, sky, even architecture somewhat? (Technically cannot be sure they look human yet, but — again, anything that predicts 'similar and survivable' at all probably has no reason to be as alien as it could get away with within those bounds, either… Stories would? Not all stories, you know that some of them do other incompatible things, but point taken.))

— if this happened once, though, it might conceivably happen again, or a wider space of things formerly thought impossible may turn out not to be. (They would not, actually, know, if some of the mysterious disappearances per year have always ended up on other worlds.) This — is not a lever, yet, but it is a unique angle, which I had been looking out for.

— right, paying external attention now.

"The opposite side of the planet is the same distance from the north pole as here, because the north pole is perfectly in the middle of both places!"

"I know you'd know about the corners thing because our education is just very, very good and the system of corners is so utterly ubiquitous, so for anyone to end up anywhere, they'd have to know some way of doing that. Even if you have amnesia, the chance of me just bumping into the perfect right time for you to not have re-learned the corners thing is wildly unlikely."

"Ohh, of course, right! And you want to distinguish all those, so you also need the distance along the concentric circle? Or is it something else and not continuous distance?" Or probably something I haven't come up with yet at all, that happens a lot. Still, how would you set up as similar an education throughout nigh on the whole population- You could ask? "Um, how many people are there on your planet?" They raise their hand in a 'wait' gesture, though, thinking of ways to put another thing.

"…And, well, subjectively I've only been here since sometime this morning. So, maybe it's unlikely, but I can't see how it's more unlikely with amnesia than it is with whatever weird thing actually happened." Maybe it is, depending on your model of how the weird thing works? But I know of no reason to expect a skew either way yet. Huh, suppose so! Though I feel like it's less true than it's complicated and distracting to say out loud, so I don't think I'll mention it. "Though, admittedly, it might still turn out that I've made myself up a backstory fictional world and convinced my brain I was from there. I think that's usually less vivid memories but I don't have direct experience, it's not like I tried to have those and vividly at any point…"

(— if they genuinely wonder — I agree this is not how they would expect that to feel, but I would like to be surer — they could check if their bag has the contents they expect, including those that imply the world they believe they knew? That would at least imply preparation on your part. My part, or their part? This is very characteristic of you to try on purpose, while I struggle to imagine what anyone who is recogniseably me would need to do this for, and in what situation? But not more impossible than having actually moved, and they need not have been recogniseably either of them, in the scenario, so- yes, their part.) And they do start hauling the bag back upward onto their lap, to look through more conveniently during the next lull in conversation.

(Also, might this person just be lying for a stunt, they had earlier guessed 'not' but- no, still true that the language thing is impossible then. To keep in mind the space of possibilities, though.)

"Yes, that's right, you need to find a... north pole of sort for the longitude. 15 billion people live on this planet, actually!" The man in the fursuit shuffles a little, curious about what the stranger is going to do.