You're asking someone who may literally work at a surveillance company to publicly admit to the stuff they linked? Personally I think it was a bad idea for them to post that link or even suggest they know it exists.
I was super young, like maybe 4-5 or something, when my family took a short trip south from San Diego (USA) into Tijuana, Mexico since the border was right there and it wasn't a big deal back then.
I remember seeing price tags and being really surprised... That they were in US dollars.
I don't think I had even started school yet, but I still knew that different country = different language and different money. Not sure how people can miss that so easily.
The limit that the 3 body problem presents is that there is no exact solution, and inexact solutions will eventually desynchronize so much as to become worthless for predictions. But the key word is 'eventually' - if your initial measurements are good, there could be years (and in the case of the planets of the solar system, millions of years) worth of useful predictions.
Oh yeah, I remember reading this (and other stories by the same author) on Kuro5hin decades ago. I'm not sure I agree with the superlative, but it was definitely a freaky story.
Haven't watched the video version yet, but from the first few minutes it seems like just an audio book of the text.
How do people notice that kinda thing?