"X is down/broke." No, Kelly, the internet isn't "down." You typed the URL wrong in your browser.
People will state it like the entire company has lost internet connectivity, or an entire department cannot access files or run a certain program, when actually, only a single user is having a problem.
Also people not knowing the difference between log out, restart, and shutdown. Even after explaining it to them.
At one point, I had to explain to my dad that we're paying for internet access, not for all servers to be available and sufficiently fast. He was not happy about that.
I can't really sympathise with you here. You're clearly an IT guy, so the difference between log out, restart and shut down is as natural to you as breathing. For the average person is not that intuitive. For many people the computer is "on" when they press the power button and enter their username and password. And the blurring of the distinction is increased by most people having a smartphone where just lifting it up to your face wakes it up and logs you in (technically) at the same time.
I know you're explaining it to them, but if that's not something that they live and breathe, they're just going to forget the explanation. I'm a molecular biologist, so to me the differences between genome, transcriptome and proteome are bleeding obvious, but I have a colleague who's not a scientist but needs to become familiar with these terms. I explained them to her last week in an meeting that lasted an hour, but this week I had to do that again. She's not stupid, it's just all very abstract to her.
I still think your promoting the view of "this is obvious to me so it should be obvious to everyone". Even your explanation would be confusing for someone who's not an IT guy - what does it mean "end my user session?" People rarely go to the start menu to deal with their computers' "on-ness", they just press the hardware button that has an incomplete circle with a line on top or often no marking or label at all. Or they close the lid and that makes them think of their laptop as "off".
It's not about being "obvious." It's about understanding the most basic concepts involved with using a piece of equipment that is central to their job and has been that way for decades.
I wouldn't want ride in a car with somebody that couldn't remember what the difference between red, yellow, and green traffic lights are, or couldn't remember how to activate their turn signals or windshield wipers. And I certainly wouldn't want them operating a vehicle as a core part of their everyday job.
Now I'll grant that in general, a car is far more dangerous than a computer. But the principle still holds, these are not tough concepts to understand, takes literally 5 minutes to explain at most. Plus, they haven't changed in at least 30 years, so it's not some new fangled techno-babble.
People should know basic concepts about tools without which they can't do any part of their job.
Your colleague will learn this terminology at some point. I'm sure her job isn't litterally juggling these three terms all day every day, otherwise I'd expect her to already have come in with that knowledge too.
Honestly, even though I use computers for work all the time, I don't think I ever talk about logging in or out or switching it off or restarting, other than when I'm getting some help from IT.
Chances are you were clothes with aglets a lot, and aglets keep the integrity of your clothes, but there is also a good chance that you don't know what aglets are because the average person doesn't talk about them until they lodge somewhere in their washing machine.