Signals must to be costly in order to be effective
Spent my childhood at boarding school having my head stuffed full of Latin and Greek. Forgotten all of it.
Utter bollocks.
A safety pin though ones nose and a pair of ripped tights costs nothing, and signals who one is (or wishes to be) very loudly and clearly.
Instead if they know Latin then my prior assumption would be that they are intelligent.
Acquiring information is costly (multi armed bandit) which is why signaling is important. Perhaps in the future with AI and attestations we can replace expensive signals with cheaper ones that are more difficult to fake and thus more honest.
With the improvements in machine intelligence I have become much less concerned with human intelligence and only persist with disagreeing with netizens out of a quickly fading residual sentimentality.