"Post asking a question"

Does anybody know why crossword puzzles so frequently repeat clues and answers--not one paper over time, but multiple papers at the same time. The New York Times, USA Today, and my local paper will all use the same word in different puzzles all within a short time span, and I know these things must be written fairly well in advance. Moreover, they're all by different people.

For example, "Ile de la Cite" does not just appear out of nowhere in two separate crosswords.

It seems to happen way too much to be accidental, but I don't have a plausible explanation. Five DR points for the person who comes up with the most plausible explanation.

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Morphic resonance

(which may or may not be another name for salience bias)

Has been asked

Did you google it? The question has been asked before.

I am sure the chances of

I am sure the chances of this happening are a lot higher than most of us would predict: http://www.youtube.com/watch?v=98OTsYfTt-c