I’ve seen “let alone” used on Lemmy a good number of times now and, at least when I noticed it, it was always used incorrectly. It’s come to a point where I still feel like I’m being gaslit even after looking up examples, just because of the sheer amount of times I’ve seen it used outright wrong.
What I’m talking about is people switching up the first and last part. In “X, let alone Y” Y is supposed to be the more extreme case, the one that is less likely to happen, or could only happen if X also did first.
The correct usage: “That spaghetti must have been months old. I did not even open the box, let alone eat it.”
How I see it used constantly: “That spaghetti must have been months old. I did not eat it, let alone open the box.”
Other wrong usage: “Nobody checks out books anymore, let alone visits the library.”
Why does this bug me so much? I don’t know. One reason I came up with is that it’s boring. The “wrong” way the excitement always ramps down with the second sentence, so why even include it?
I am prepared to be shouted down for still somehow being incorrect about this. Do your worst. At least I’ll know I keep shifting between dimensions where “let alone” is always used differently or something.
You are getting confused because you are comparing negations. It’s “visiting the library” that is less extreme than “checking out a book”.
This is also more of an example of dependency rather than extremity. That is, “checking out a book” could only happen if “visiting the library” happened first. So you could say “I never even travelled to North Korea, let alone bought a souvenir there” – while buying a souvenir is small compared to travelling to NK, the travelling would have to happen first, so the phrase makes sense.
This is not confusion, but a different view point, just like 6 is 9.
In the previous example with the library, at least people are still reading books in a library. One should be happy that the library is being used. However, if people don’t even go to a library, that is more extreme because its existence will be futile.
“I’ve never bought a souvenir in North Korea, let alone traveled there.” is just another way to phrase the same fact from a different view point. Buying souvenirs is trivial and it would be trivial, if I had ever been to North Korea, and since I haven’t, it’s the more extreme of the two.
Do you understand now?