 “Indexical” solutions of the Liar have been developed in several contributions, e.g., by Burge, Gaifman, Simmons. The idea is that the Liar paradox does not involve sentences, but specific occurrences of sentences, i.e., sentence tokens (this idea is to be found already in scholastic solutions). For the sake of historical accuracy, let us mention that in 1913 Lesniewski, later Tarski’s dissertation advisor, had already advanced an indexical nominalistically inspired solution of the Liar in his paper A Critique of the Logical Principle of the Excluded Middle (see Betti 2004).