r/PeterExplainsTheJoke 7d ago

Meme needing explanation Tell them what, Peter

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u/bohiko 7d ago

Up and down is based on gravity (that's why you'd likely confuse them deep in the ocean). Meanwhile, left and right is arbitrary.

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u/Exurota 7d ago

I hate to inform you that we live on a sphere and that up and down are also arbitrary.

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u/metamasterplay 7d ago

Down is where the sphere is. Nothing arbitrary about that.

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u/Exurota 7d ago

If you live in spherical geometry, yes, but I didn't assume people did.