ABSTRACT
The third reform of speculative grammar, i.e., the doctrine that a sign has two objects and three interpretants, emerges in a 1904 letter to Lady Welby. The distinction between the immediate and the dynamic object of a sign emerges in 1904. The immediate object is the level of analysis at which the dimension of quantification is taken into account. The new trichotomy according to the immediate object that Charles S. Peirce communicates to Welby in the letters of December 1908 constitutes a further shift of doctrine. In "Pragmatism" Peirce dwells at length on the different kinds of interpretants that a sign can be said to have. The method of reasoning by which Peirce came to the idea of an ultimate or continuous predicate in 1908 is the same as that by which he came to the idea of an ultimate or logical leading principle in 1866.
