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Copper Rule
(i.imgur.com)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
I feel like half of xkcd is just knowledge-one ups on the reader. No fucking clue what ea-nasir is. Google says it's some ancient merchant from Mesopotamia. Not sure how that's humorous but I'm sure there's a niche reason the author is very smart for observing.
He's an ancient mesopotamian merchant who ripped people off and we know of him because we have bunch of clay tablets from people complaining about being ripped off by him.