Jon AS and Jerry LRC, There is nothing contradictory about the following paragraph:
If parts of a proposition be erased so as to leave blanks in their places, and if these blanks are of such a nature that if each of them be filled by a proper name the result will be a proposition, then the blank form of proposition which was first produced by the erasures is termed a rheme. According as the number of blanks in a rheme is 0, 1, 2, 3, etc., it may be termed a medad (from meden, nothing), monad, dyad, triad, etc., rheme. (EP:299)
I'll admit that Peirce could have stated it more clearly by writing "If N parts of a proposition be erased, where N is zero or more..." There are logics today that define a proposition as a relation with zero arguments. In effect, Peirce was making the same assumption -- and for the same reasons. John
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