" . . you did promise to tell us what is it about the weak nuclear force that makes it harder to put on a lattice than the other forces.
0:55:55.3: Very good. The technical name is parity violation. The non-technical way of saying it is that nature has an astonishing property, which is that things can happen in the mirror that cannot happen in our world. That the laws of physics look different when viewed in a mirror compared to what's sitting in front of you. So, if you do see something in our world reflected in the mirror, I know the listeners can't see this, but I can see your books behind you. I can see that your books are the right way round because your general relativity textbook is sitting there prominently and I can read the words. And if this screen was flipped, actually for you it probably is flipped because we're doing this on Zoom and Zoom does that, you wouldn't be able to read it. So you can tell whether you're looking at the real world or looking at something in a mirror. That's true in our world because our world is complex and there's things like writing that we've developed. The astonishing fact that was discovered by Chen Sheng Wu in the 1950s is that the same is true on the most fundamental level.
https://www.preposterousuniverse.com/podcast/2025/07/14/321-david-tong-on-open-questions-in-quantum-field-theory/
Sean Carroll is an expert on the preposterous.
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