Is kuon a word? What word am I thinking of? [closed]

I thought kuon was a word that meant any type of small riddle or puzzle.

Eg: I thought that 'When a tree falls in the forest does anyone hear it?' was a kuon.

But my googling finds no evidence for it.

I am not thinking of the word enigma or haiku either.

Is this all in my head or did I invent a new word ...?


Solution 1:

a koan is defined (M/W) as

a paradox to be meditated upon that is used to train Zen Buddhist monks to abandon ultimate dependence on reason and to force them into gaining sudden intuitive enlightenment