Being able to actually do anything you understand well enough, the way that magic works in many settings. A brilliant engineer can design an airplane, but he still needs lots of workers and machines and materials to actually build one. A wizard who knows how to cast “fly” can just go ahead and cast it and fly around. If he has the right books, he doesn’t need other people for anything at all.
The sort of mystery only possible in a story where the author himself doesn’t have to know what the secret is. I love science but I was very disappointed when I was a kid and I realized that science meant that everything ultimately had a mundane explanation. A mysterious structure? Built by some Bronze Age dudes. Dinosaurs? Unusually large animals. Legendary heroes? Made-up stories. Even if elves or unicorns turned out to be real, they would have a mundane explanation too because the whole universe follows rules.
What blew my mind is this. What is the sum of the infinite series
1, -1, 1, -1, ...
One answer is to look at it like this:
(1 - 1) + (1 - 1) + ... = 0
Another answer is to look at it like this:
1 + (-1 + 1) + (-1 + 1) + ... = 1
But then it gets weirder. What if you add two of the series together like so:
1 + -1 + 1 + -1 + ...
____ 1 + -1 + 1 + ...
(Please ignore the underscores. They’re just there because otherwise Lemmy messes up the whitespace.)
All the terms cancel out except that first 1 again. But this time it’s the sum of two of these series, which means that the sum of one series is 0.5 and somehow not an integer.
The correct answer is that you’re not allowed to add up infinite series like this so that’s why you get contradictory results if you try.