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Using the Categorical Converter - 2 The S and the P need not appear in the same order every time. For example, we can have the sentence All S are P and we can also have the sentence All P are S. The letters on the right side of the diagram indicate the order of the S and P in the diagram. Together with the letters at the top, we are given a complete description of every proposition () in the diagram. Thus, for example, the directly under the A and directly to the left of SP is: All S are P. Or, for example, the directly under the O and directly to the left of nPnS is: All non-P are non-S. Please click here to continue. 10 August 1996 For Educators Stephen Downes Guide to the Logical Fallacies Copyright © Stephen Downes, 1995-2001 stephen.downes@ualberta.ca