  Many of these scenarios are designed to test advanced problems that will not be discussed here—for instance, challenges dealing with multiple agents, or with continuous changes. Here, we concentrate on one of the earliest, and probably the most subtle of these scenarios: the Yale Shooting Anomaly, first reported in  Hanks &amp; McDermott 1985  and published in  Hanks &amp; McDermott 1986;  Hanks &amp; McDermott 1987.