Conclusion

• We're faced with problems every day in life, and we almost never get clarity. We jump into the middle of a problem,
  we carry it through to whatever extent we can to find an answer, then we just get on with things and find the next thing. Whereas with a human-made puzzle, you have the satisfaction of being completely in control: you start the challenge from the beginning, and you move all the way to the end. That's a satisfaction you don't get much in real life. You feel
  in control, and that's a great feeling.
  And as with any human activity, you want to know how good you are compared with other people.
  Will Shortz, US American enigmatologist (study of puzzles), crossword editor for the US American daily newspaper The New York Times, cited in: article The Answer Men. Meet the best problem solvers in America, presented by the US American weekly news magazine TIME, Lev Grossman, S. 2 of 7, 11. March 2013