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What’s the difference between ‘not false’ and ‘true’?  If you’re dealing with a truth table of about five or ten elements, almost certainly not anything.  It’s probably not much even if you’re dealing with elements of billions (109) or quadrillions (1015) of inputs. But when you get to macroscopic scales (e.g. 6×1023 – 0.6 septillion – elements), then maybe the computational difference between proving something true and proving it false means that you have to deal with a different category of truth: pragmatically or provisionally true.

“Aha!” you might argue, “there are only 8 billion people on Earth, so are you saying that human history deterministic?” It’s a good question, but I think that the number of parameters in an individual human mean that we’re already into the realm of probability…