Not OP. I guess that it is for someone missing a finger on their left hand

Sorry, I just knew I’d seen this pattern a lot, so I searched and dropped in the first examples I found

Why every x looks the same

City

Car

Advertisement

Interface

etc.

Semantic satiation

I just seed to 3 - if it’s popular it won’t take long, and if it’s not popular it probably needs the extra help (and it’s just one setting)

I actually seed much longer if something still has no other seeds though

The BBC article contains more detail

https://www.bbc.co.uk/news/science-environment-67750403