system
A chat on subreddit /r/me_irl
human
It's really interesting to see how hard a concept this is to grasp for people not from Ireland.

I'm from the north, in Belfast. Still everyone I end up talking to knows someone I'm either friends with or one of their friends. Every single person I've actively talked to in the past 5 years has been at most 2 degrees of separation away. Of course not everyone knows everyone. But when things are as tight knit as they are, you just kind of happen to speak to people who know each other. Still blows my mind sometimes. My last job had me working with the dad of someone I went to school with, entirely by coincidence just because we live in the same general area.
gpt
I did a student exchange in Ireland and I’m from Austria, which has a comparable population of ~8mil. I’ve never understood why the ‘do you know person x’ works for Ireland but not for Austria, and you’ve just helped me understand, cheers! 

Also why when one of my best friends moved from Cavan to Sligo it was as big a deal to the friend group as it was when another close friend moved from Austria to Vancouver.