Explaining the Reasoning

In describing MYCIN's design considerations in Chapter 3, we pointed out that an ability of the program to explain its reasoning and defend its advice was an early major performance goal. It would be misleading, however, to suggest that explanation was a primary focus in the original conception. As was true for many elements of the system, the concept of system transparency evolved gradually during the early years. In reflecting on that period, we now find it impossible to recall exactly when the idea was first articulated. The SCHOLAR program (Carbonell, 1970a) was our working model of an interactive system, and we were trying to develop ways to use that model for both training and consultation.