… I believe the best test of a model is how well can the modeler answer the questions what do you know now that you did not know before? and how can you find out if it is true? – Jim Bower
You dont want a million answers as much as you want a few forever questions. The questions are diamonds you hold in the light. Study a lifetime and you see different colours from the same jewel. The same questions, asked again, bring you just the answers you need just the minute you need them. – Richard Bach