Tractarian Notations

In the TractatusWittgenstein presents two different notations for logic: the truth-tabular notation introduced at TLP 4.442, and the so-called N operator notation at TLP 5.502 (plus a third notation, the so called ab-notation, at TLP 6.1203). Gregory Landini (2007) has argued that both the truth-tabular notation and the N operator notation fulfill theWittgensteinian ideal of having a language in which all and only logical equivalents have exactly one and the same expression. In this paper, I show that Landini’s argument is mistaken, for it overlooks the crucial Tractarian distinction between truth-operation and truth-function