There are so many topics of thinking in life where I struggle to reach a settled view. Amongst my dilemmas is what judgement to make on the law firm that did the salads for women offer on International Women's Day 2017 - see March Late Life Crisis. However, though what follows has not generated a Eureka moment, the Overton window may help as a thinking tool.
We are back to 1999. Suppose that you are running a small Post Office branch. You enjoy the business: it provides a stable income, you like the people contact, and your customers value the service you give to the community.
However, all is not well. The Post Office have recently introduced a new computer system called 'Horizon'. The system is designed by Fujitsu. It is supposed to simplify your accounting for daily takings. Yet it is doing the opposite. You are starting to see accounting shortfalls.