Because it's actually an answer to a simple problem -- getting my mother out of the burning building is a simpler problem than getting her out of it alive and well, so the clearest. simplest solution to the former is a wrong solution to the latter. (In such an example it is obvious, but in many real-world situations it's easier to lose purposes.)
People want to tell everything instead of telling the best 15 words. They want to learn everything instead of the best 15 words. In this thread, instead post the best 15-words from a book you've read recently (or anything else). It has to stand on its own. It's not a summary, the whole value needs to be contained in those words.
I'll start in the comments below.
(Voted by the Schelling study group as the best exercise of the meeting.)