Nice post! I think though that there is an important class of exceptions to scope matching, which I'll refer to as "well-engineered systems". Think of for example the "The Wonderful One-Hoss Shay" described in the Oliver Wendell Holmes poem where all of the parts are designed to have exactly the same rate of failure. Real world systems can only approach that ideal, but they can get close enough that their most frequent error modes would fail the scope matching heuristic.
I bring this up in particular because I think that crime rates might ...
Chad Ellis wrote a good blog about negotiation for many years at http://negotiatewithchad.blogspot.com/.
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