system
A chat on subreddit /r/NoStupidQuestions
human
There's is an old joke: How do you know someone's vegan? Don't worry, they'll tell you.



There is a stereotype that exists of vegans that they're basically insufferable people. In this stereotype, veganism is their whole personality, and the vegan acts sanctimonious. 


Not every vegan is like this, but if you go around reddit enough, you will find people fitting this description.
gpt
I visited some friends in California a bit ago, and they had some other friends over while we were there. The *first* thing out of these people's mouths was that they were vegan, and all about their vegan lifestyle. They made it a point to fit it into *every single* conversation piece over the course of that visit. 

...I wish I was surprised by this lol.