Das Problem, der Spruch, die Lösung

For many people aphorisms are just part of their daily routine. A present is given at a birthday party together with a card with a (more or less) witty, funny or provocative saying in it. Doctoral dissertations are famous for their many aphorisms, and many authors are tempted to preface every single chapter with an appropriate saying. In short: aphorisms may be found everywhere, in all sorts of co...