The fear that the obscure name or reference you just dropped was either incorrect or mispronounced.

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When I was a sophomore in college, I spent an entire class period pronouncing, “Goethe” phonetically.

I found out later when I said “Go-thhhh” to my father who, in his characteristic charm informed me, “It’s pronounced ‘Gher-teh,’ you dickhead.”

I still crumple from the shame.