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Answers to this rephrased question, some of which Slade lists, with all the attendant symbols and terminology, fill the next six notes; presumably these and like notes form the bulk of the calculus. How he arrived at some of these solutions would, presumably, have been discussed in the two, undelivered lectures. Fortunately, Slade’s students from BPR-57-c have been able to fill in much here, as this is exactly what Slade had been wrestling with during the original work sessions for three years. Some of their papers will appear in future issues.

Since Liebniz, or even Aristotle, the boundaries between mathematics and logic, and between logic and philosophy, have always been strangely fuzzy. Try to define them too carefully, and they disappear. Change your position only a fraction of a degree, and they seem clearly present once more. From this new angle we begin to define them again—and the process repeats. Is it, then, just the maverick statements that our third

critic would claim Slade has simply scattered through his discussion of the logic of models that tempt us to take what seems essentially a discussion of the foundations of a limited, mathematical discipline and call it a philosophy? Your editor does not think so; we feel that for all its eccentricity of presentation, Slade’s work is philosophically significant—though already (a situation which has existed about Slade’s wofk since the publication of the Summa) articles have appeared which claim otherwise. The emblem of a philosophy is not that it contains a set of specific thoughts, but that it generates a way of thinking. Because a way of thinking is just that, it cannot be completely defined. And because Slade’s lecture is incomplete, we cannot know if he would have attempted even a partial description. Your editor feels that the parameters for a way of thinking have, in the extant notes of Shadows, been at least partially generated. Rather than try to describe it, we think it is best to close this limited exegesis with an example of it from Slade’s lecture. The note we end on—note seven—along with note twenty-two, completes the clearest nonmathematical explanation of the calculus Slade was trying to describe. (In note six, Slade talks about the efficiency of multiple modeling systems, or parallel models, over linear, or series models: his use of pictures, in note seven, to distinguish between words about reality and the real itself is a self-evident example of what he discusses in six. Slade drew the pictures hastily on his blackboard with blue chalk and pointed to them when they came up again in the flow of his talk.) Here is note seven: