February 19, 2019
WE ARE ALL DESIGNIST NOW:
A Different Kind of Theory of Everything: Physicists used to search for the smallest components of the universe. What if that's not the point? (Natalie Wolchover, 2/19/19, The New Yorker)
Perhaps the most striking thing about those explanations is that, even as each draws only a partial picture of reality, they are mathematically perfect. Take general relativity. Physicists know that Einstein's theory is incomplete. Yet it is a spectacular artifice, with a spare, taut mathematical structure. Fiddle with the equations even a little and you lose all of its beauty and simplicity. It turns out that, if you want to discover a deeper way of explaining the universe, you can't take the equations of the existing description and subtly deform them. Instead, you must make a jump to a totally different, equally perfect mathematical structure. What's the point, theorists wonder, of the perfection found at every level, if it's bound to be superseded?It seems inconceivable that this intricate web of perfect mathematical descriptions is random or happenstance. This mystery must have an explanation. But what might such an explanation look like? One common conception of physics is that its laws are like a machine that humans are building in order to predict what will happen in the future. The "theory of everything" is like the ultimate prediction machine--a single equation from which everything follows. But this outlook ignores the existence of the many different machines, built in all manner of ingenious ways, that give us equivalent predictions.
To paraphrase another physicist, "we have no idea what the Final Theory will be, only that it will be beautiful and simple."
Posted by Orrin Judd at February 19, 2019 6:22 PM
