Interdimensional Traveler

"What's a Canadian? And what's the United States?"

"In my home dimension, you're an actress." You tell her what name she uses in your home dimension.

"Interesting...that's my name here too..."

"Kinda figured. You're from Vancouver, right?"

"Yeah..."

"And that's in Canada, no?"

"No, it's in Cascadia. And what the hell is this Canada you keep talking about?"

"In my home dimension, it's a country, just like where we are would be in a country called the United States."

"Wait a minute," she says. "There's more than one country in the Americas in your home dimension?! That must create a lot of wars...Next you'll be telling me that Charles Manson didn't discover the cure for AIDS in 1988."

"In my dimension, he is serving a life prison sentence for mass murder, and there is no cure for AIDS there."

"Wow...that's a lot to process right now...so, how does this interdimensional travel thing work anyway?"