 In a slightly different and bigger picture, van Heijenoort’s distinction between Boole’s calculus ratiocinator versus Frege’s lingua characteristica could be related to the topic. Agreeing with both Hintikka’s and Goldfarb’s evaluation that Peirce belongs to Boole’s tradition, Shin finds a connection between the model-theoretic view of logic (where Boole and Peirce are placed) and EG’s birth (see Shin 2002: 14–16 and Pietarinen 2006). However, Peirce’s awareness of the re-interpretation of language is necessary, but not sufficient, for his pursuit of a different form of representation. While the acknowledgment of the possibility of different models of a given system was presupposed by Peirce’s project for various kinds of systems, not every Boolean has presented multiple systems. Boole himself 