AN OVERWHELMING MAJORITY OF SCIENTIFIC STUDIES PROVE DEFINITIVELY THAT RIGHT WING BELIEFS ARE HEAVILY CORRELATED WITH LOW INTELLIGENCE:
Bright Minds and Dark Attitudes: Lower Cognitive Ability Predicts Greater Prejudice Through Right-Wing Ideology and Low Intergroup Contact
Low IQ & Conservative Beliefs Linked to Prejudice
Study links low intelligence with right-wing beliefs
Right-wing ideology and numeracy: A perception of greater ability, but poorer performance
Conservatism and cognitive ability
Intelligent people are more likely to be left-wing, says science
People with lower emotional intelligence are more likely to hold right-wing views, study finds
(Taken from pinned comment here)
They are letters tho.
I is a finger. V is the line down your thumb and up the fingers (a whole hand). X is both your hands crossed… that’s one theory as to why they used “letters” for numbers.