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They just found rocks that are naturally hot and boiled water with it... Engineering is a scam.
We have rocks that do math, transmit electricity, and fly us through the sky.
When you get reductive about the natural sciences it all just boils down to applied physics which is applied mathematics.
But engineering and technology? Applied geology.
(/s because I’m not going to acknowledge that geology is applied chemistry and so on)
You have to engrave special runes on these rocks for them to work.
I heard that some wizards on the remote island of Tayouan far east are very good at it.
In a sense, you're right. And there's a bit of magic involved. If you cut a certain special rock into slices, engrave runes on one side of it, and inject lightning, the rock starts to think. I don't see how you can describe that as anything other than magic.
Reminds me of https://xkcd.com/435/
Sometimes we take the hot rocks and ship them to other planets too.