Learn English – A word for a wild, uneducated, random guess that turns out to be correct

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Sometimes I find an outsider in a conversation with little or no knowledge about the subject or ground already covered in the conversation makes a random guess about a question no one can answer and it turns out to be correct. I have experienced this often enough that it seems like there might be a word or phrase for it, but if there is I don't remember it. Any insight would be appreciated!

Example:

Wow, Bert only said that it might be catalytic converter because he heard us say that term earlier in the conversation. He doesn't know anything about cars. I can't believe he was actually right! That was a real ________!

Best Answer

fluke

NOUN

An unlikely chance occurrence, especially a surprising piece of luck.
‘their victory was a bit of a fluke’