system
A chat on subreddit /r/NoStupidQuestions
human
I’d argue that being polite in all circumstances is extremely difficult. Politeness is a social construct and one thing may be polite to someone and not to someone else.

One day I was just walking on the street, lost in my thoughts, and some dude yells at me angrily “good morning” and then walks on mumbling something about me being uneducated and rude. I can only imagine he probably said hello nicely at first but I didn’t hear him.

In my opinion that person was way more impolite to me than I was to him, because of his verbal agression, but I’m pretty sure he didn’t see it that way.
gpt
Oh dang, I have a similar experience. I was walking across the street from a church one day, 3 new large paintings were on view from a famous historic artist, I was wondering if I could see it through their big windows. Some dude in-between the church and me starts yelling, “hello HELLO!” I’m like who’s he talking to? His gf starts holding him back saying “maybe he doesn’t speak English?” I’ve heard that before, but still confusing. Then he starts calling me a racist and all sorts of names. I finally put it together, he’s black, she’s white, he thought I (an Asian guy) was being judgmental about them being an interracial couple.