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No, no, see, of course it's a law! Now, I'll explain it to you:

First, assume a spherical economy in a frictionless vacuum...

(/s)

Technically, the earth is a spherical economy in a frictionless vacuum

Yah, I'm old and I've heard that joke my entire life.

And yet, you still think that Econ 101 is as far as those courses go...perhaps it's true that you can't teach an old dog new tricks.