I had the following conversation with a guy I work with a few weeks ago:
I had walked up on he and another of my coworkers having a bit of an argument, and I was called on to settle said argument. Keep in mind that this guy is in his early 20s.
Him: "Kath, I need to you settle an argument for us."
Me: "Ok..."
Him: "Is Panama a country?" (facepalm in and of itself..but it gets better)
Me: "Yes..."
Him: "NO IT ISN'T!!"
Me: "Uh..yeah, it is."
Him: "But it's an island!"
Me: (with eyes narrowed and giving the kid my best possible 'asshole' face) "Um...no it's not an island. There's a canal that completely divides the country, but it's not an island. And an island could still be its own country... ... ..."
Him: "But I lived there on a military base when I was a kid, it can't be its own country."
(And at this point I'm aggravated that this guy's parents have moved him all over the world but never fucking took out a map to show him where his various locations were on it).
Me: "The US has military bases in a lot of different countries"
Him: "But I didn't need a passport..."
Me: "Because it was US military base that you probably landed on every time, so no, you wouldn't need a passport for that. If you landed anywhere else in Panama you would have needed a passport. Panama is still its own country dude."
...it gets even better...
Him: "But isn't that Central America?"
Me: "Yeah"
Him: "Well then what about Belize?"
Me: "Yeah, that too."
Him: "But then what about Mexico?"
Me: "That's North America"
Him: "But this is North America- aren't they all considered the same thing?"
Me: "Dude...we live in the United States of America...and yes we are part of North America...but the North American continent consists of two other countries besides ours...you know...Canada...and Mexico...and once you get south of Mexico that's considered Central America."
Him: "But then what's South America?"
Me: "It's this whole other continent dude...that's where countries like Brazil and Argentina are located."
This guy's mind was officially blown. I still don't think he fully understood the concept.
So then as I was walking away, I said:
Me: "Well thanks for the laugh at least...and now I've got the Van Halen song stuck in my head."
Him: "What song is that?"
(I won't fault him for not knowing Van Halen...but I am going to absolutely fault every single one of this guys teachers/parents/whatever for not teaching him basic geography shit).