A man without eyes saw pears on a tree; he did not take pears, he did not leave pears; how can that be?
The usual answer to this very old riddle is that
the man had one eye, took one pear and left one pear.
I have to say that
I would not say that someone with one eye is "without eyes"; that's not how the word "without" works. Nor would I say that someone who takes one thing "does not take" whatever it is, and likewise for leaving. So this riddle is, for me, in xkcd 169 territory.