Eli5: Why do people mix up left and right but not up and down?
In: Other
because reference you used when determining right/left is the direction you are facing, and therefore changable
whereas up/down is determined by gravity essentially
even if you are doing a headstand, the direction your sweat fall is down
if you are lying down, your front & up is the same direction
in short, reference axis for front/back/left/right is different from reference for up/down
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