It is generally understood, although not necessarily accurately, that the number "2" means "2.000...", that is the number two with an infinite set of zeroes after the decimal.
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In fact there's plenty of specific evidence from physics now that calculus does not reflect "underlying fundamental physical reality" (whatever that might mean) The real world isn't actually continuous, it's discrete, it has pixels
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Therefore calculus, which started out based on the assumption of a continuous world (the "infinitesimal"), is a shortcut, a kludge It lets you calculate shit faster than counting up all the particles or whatever that are actually there
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I mean, calculus just is. It's even been "discovered" by biologists. You don't have to use it, but it's still there. In the dark. Waiting. Ready to pounce. Oh, no, I have confused calculus with spiders, never mind about the last few things.
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The average adult human ingests eight calculuses while sleeping each year.
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