Even if mutual exclusiveness is ultimately achieved, modeling inter-relationships would still be useful. For example, in biological classification, humans and dogs aren't in the same Order, but their association with each other is notable enough to be recorded.
Accepted
The "Seven Plus One" principle used in 7PK, along with its emphasis on a single audience of developers, makes it psychologically acceptable. The 699 view, which borrows from previous taxonomic efforts and uses other categories to fill in gaps, is likely to be acceptable since it will be familiar to its intended audience. On the other hand, the 1000 view is not intended for basic developers, and its approach to classification is different than previous efforts. As a result, it requires a different mind set than people are used to, which could make it more difficult to adopt. However, we believe it is an important step forward in the understanding of weaknesses.
Categories Allowed