In their preprint, the Korean authors note one particular temperature at which LK-99’s showed a tenfold drop in resistivity, from about 0.02 ohms per centimetre to 0.002 ohms per cm. “They were very precise about it. 104.8ºC,” says Prashant Jain, a chemist at the University of Illinois Urbana–Champaign. “I was like, wait a minute, I know this temperature.” The reaction that synthesizes LK-99 uses an unbalanced recipe…
> Jain, a copper-sulfide expert I would have never known that people are actual experts in one material. This is impressive.
This is also why experts can often sniff one another out on online forums like this. There's a subtly to the language that is used which conveys an understanding of many deeper nuances than were a novice or even someone with a undergraduate would use to discuss a topic. There's a common misnomer that you don't understand something unless you can explain it to a layman (probably invented by a layman to justify their lack of understanding), but accuracy and complexity are tightly coupled. A concept with x% accuracy has a minimum of y complexity. But also knowing this can help you sniff out experts in fields you aren't also an expert in, but of course your classification accuracy drops since you are introducing more noise. Still, a useful guide if you're trying to figure out who to listen to. Obviously much easier said than done.