Curate, connect, and discover
after doing a bit of googling, i cannot find a single actual study that has been done to determine why orange cats are considered stupid, but i have a theory.
its because orange cats are mostly male
now thats not me being "heehoo men stoopie" (very stupid trans man), its like a valid theory. 80% of orange cats are male (quick google search results) because the gene for being orange is linked to the X chromosome, so most gingers are male.
so i propose an experiment.
we take two groups of several common coat colors/patterns of domestic shorthairs (since those are the most common housecat (another quick google search). each of the 2 groups for each coat will have 100 individuals, one group with the average male/female ratio of that coat normally (for gingers that would be 80 males, and 20 females) and the second group would be 50/50 male female.
then, follow the cats from birth to maturity (~2 years old)(google search) and track "mental" milestones. also important that these cats would be raised in a typical "household" setting you found find a normal domestic cat in, and they would be raised alone.
then, after all that info is gathered, compare the relative intelligence of the cats of the average m/f ratio and the 50/50 m/f ratio. theoretically the average m/f ratio of orange cats should be dumber than the 50/50 ratio of oranges
and then, finally, we (and i) will have a true explanation for why (my) orange cat(s) are fucking stupid as all hell