" It's from the newspapers that people I know - relatives and co-workers - have got the idea that crosswords are a prophylactic against Alzheimer's. Newspapers are of course also the place where crosswords (and now sudokus) are most readily available, so the association is presumably good for circulation. "

― Alan Connor , The Crossword Century: 100 Years of Witty Wordplay, Ingenious Puzzles, and Linguistic Mischief