A grain of sand from the era might just crush you. At this point, there are many methods; you can't change a grain of sand from the era. You can hold on, survive, give up on life, give up on existence, not care, find a paradise in your inner world, and choose many paths, but you can only change yourself.
Everyone's world is different.
Discussion on the accuracy of blood glucose meters. The second time. Discussing with my mother-in-law. The first time I thought the method I mentioned was more reliable and had been accepted. The second time, I heard the same statement again. Blood glucose meters are often compared with the results of blood tests from hospitals. This is also a method recognized by most people, just like synchronizing time with some observatory.
I am a repeater, reiterating the views of Tang Renjie. He actively and passively (through gifts from manufacturers) tested countless blood glucose meters, both finger-pricking and silicon-based dynamic ones. Previously, I was also entangled in the accuracy of finger-pricking meters, often queuing at the hospital, but later found it completely unnecessary. As long as the blood glucose meter is qualified and not abnormally damaged, the deviation in values can be negligible. Generally, the deviation is not more than 0.x or 1.x to 2.x. The issues are not significant. The important thing is to measure frequently, measure on time, and keep statistical records and analyses.
Before there were such precise instruments and computers, the weight of the Earth was calculated to be about 600 trillion tons using the brain. Cavendish's experiment in 1797 measured it. Some people wanted to replicate it but couldn't, so they used ready-made setups in laboratories. To be honest, I only remembered the name of Cavendish's experiment, and it was only today that I understood what he did.
All this talk essentially means that imprecision can actually be quite accurate. The key is to measure more, quantify more, and analyze more.
Some people might give up on repairs because they have a low-accuracy pointer electrical instrument. Others might give up gaming because they have a low-DPI mouse. If the ping in competitive games is too high, do they just gg? Yang Guo's heavy sword without a blade means he doesn't know swordsmanship, right? Because he is too lazy to sharpen the sword?
What is the core, and what is the form?
The above is what I haven't said. Because fundamentally, it can't be said. Even if said, it is useless; changing the world can only change your own world. Changing others is not easy (impossible). Even if Jobs changed the world, those using his products still live in their own worlds. His products are like a wormhole, allowing people from different worlds to have some intersection. It's very similar to the internet.