Especially focusing on different cultures & Epoch's attempt to answer that question :

You know you're educated when....

- you have a detailed knowledge of Greek Myths...Eton & Harrow in the 1700s
.

- you can handle a sword.....France/Germany in the 1800's
.

- you are good at harmony-singing....US Ivy league ( dunno when, exactly )
.

- you know not to strike a horse anywhere in front of the stirrups ( Mongolia, Gengis Khan )
.
- you have an intimate knowledge of fine Wines ( James Bond )
.
- you know when to keep your mouth shut and to turn a blind eye ( prison for Rookies )

[Link]

Edited by PalazioVecchio (11 Apr 2023 2.37pm)

Kayla did Anfield & Old Trafford

You know what fork to use when eating soup.

“That’s a joke son, I say, that’s a joke.” “Nice boy, but he’s sharp as a throw pillow.” “He’s so dumb he thinks a Mexican border pays rent” “ “Son… I say, son, some people are so narrow minded they can look through a keyhole with both eyes.”__ Forhorn Leghorn

You know that Aristotle is more than just a made up word in a tortuous rhyme for arse.

you are never the third soldier to light a cigarette on a match.
( the Somme Adult Education College )

Kayla did Anfield & Old Trafford

semi colons are the ultimate litmus test, and you can spell diorrhea, sorry that's diarrhoea, and you can use chop sticks