If we had to reanalyse the scene from the start, we would have to, (1) lose the knowledge about "A," Each frame has terminals for attaching pointers to substructures. It seems not often realized that Completeness is no rare prize. When a proposed frame cannot be made to fit reality–when we cannot find terminal assignments that suitably match its terminal marker conditions–this network provides a replacement frame. If you try to change the description of a scene actually projected on your retinas, your vision system is likely simply to change it right back. Directories factor the problem, basing paths on standard routes between major nodes in the network. Its presence has usually a cause and often some other significance–perhaps as a clue in a puzzle, or as a symbol of a changing relationship. Any parent knows that the Party-Meal is bound to Eat-2 of its Day. But if we imagine working within some bounded domain we can discuss some important issues: EXPECTATION: How to select an initial frame to meet some given conditions. We could represent this as an action transformation of the simplest kind, consisting of pointers between pairs of room frames of a particular house system. C. Bartlett {Remembering}. The experienced mechanic need not routinely invent; he already has engine representations in terms of ignition, lubrication, cooling, timing, fuel mixing, transmission, compression, and so forth. While "class," taken literally or mathematically, forces one into an inclusion-based hierarchy, "concepts" are interrelated in different ways when in different contexts, and no single hierarchical ordering is generally satisfactory for all goals. C. Bartlett {Remembering}. Given an expectation about the size of a room, we can estimate the elevation of "e," and vice versa. One would expect, then, also to find the same belief in, Most A's are B's and Most B's are C's I think (Papert, 1972) is correct in believing that the ability to diagnose and modify one's own procedures is a collection of specific and important "skills." The simplest, perhaps, are those in which the result of achieving a first goal interferes with some condition prerequisite for achieving a second goal. But if we want the move generator not to make the "same kind of mistake" again, the message must contain some additional clue about why B is weak–or better, what to do about it. The effects of important actions are mirrored by transformations between the frames of a system. In data or network communications, a frame is a data transmission unit with a header indicating the beginning and end of a block of data. I sense frustrated procedures trying to resolve these tensions and conflicts more properly, here or there, into the sleeping framework that has been evoked. In his scheme for plausible inference, statements are not simply accepted, but are subjected to a process of "doubting" and "believing"; in effect, things assumed by default (or plausibility) are retained with mechanisms for revising those beliefs when later, dependent assumptions run into problems.