Comment by akerl_

You're the one who's extrapolated that the rule asks you to assume ignorance. The post, and the Recurse Center guidelines it's built on top of, don't make that claim.

If I say it's a social guideline to not tell somebody about something wrong with their outfit unless they can fix it in under 5 minutes, I'm not suggesting you go around assuming that everybody knows they have a stain on their shirt. I'm telling you it's net-negative to point it out to them.