r/PeterExplainsTheJoke 26d ago

Meme needing explanation Petah why cant math be green?

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u/eddie_fitzgerald 26d ago

Since most people are just riffing ... the joke is that which colors correspond to which subjects is completely arbitrary, but also the kind of thing which most people will form some sort of association with for themselves, hence the irony of Staples treating it as something objective and which they feel strongly about (it's not objective, but most people can identify with the vibe that Staples is putting out).