Orchid XP v8 wrote:
> Hmm. How the **** do people compute numbers like this? I mean, how can
> you *possibly* know how many people are alive right now? Obviously it's
> an estimate, but how do we tell if it's even remotely correct? It's not
> like you can *check* it!

That is relatively easy to figure out. Add up census results.

Countries without a census are probably small enough not to matter too much;
and otherwise there are still other ways to measure how many people are in
a country.

What I can't figure out is how the **** people know how many humans were
born in the whole history of the planet.

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