This thesis comprises three main chapters—each comprising one relatively standalone paper. The unifying theme is fragmentalism about truth, which is the view that the predicate “true” either expresses distinct concepts or expresses distinct properties. -/- In Chapter 1, I provide a formal development of alethic pluralism. Pluralism is the view that there are distinct truth properties associated with distinct domains of subject matter, where a truth property satisfies certain truth-characterizing principles. On behalf of pluralists, I propose an account of logic (...) and semantics that shows how they can answer central conceptual and logical challenges for their view. -/- In Chapter 2, I motivate and develop a modal account of propositions on the basis of an iterative conception of propositions, where the modality is logico-mathematical. The modal account of propositions takes the conception to motivate an inherently potential hierarchy of propositions. I show that the account helps provide satisfying solutions to the intensional paradoxes of Russell-Myhill, Kaplan, and Prior. -/- In Chapter 3, I propose that “true” is polysemous. I suggest that “true” is initially polysemous between correspondence truth and disquotational truth, and further polysemous between the meanings corresponding to the subconcepts of the concept truth generated by the indefinite extensibility of that concept. I show that the proposal provides satisfying solutions to the semantic paradoxes. (shrink)

In this work we present a logical reconstruction of Leonard Bloom- field’s theory of structural linguistics. First, the central notions of this theory are analyzed and discussed. In the following section, a recon- struction with the so-called structuralist approach in the philosophy of science is presented. After defining the general framework of Bloom- field’s theory, questions of lawlikeness and theoretical terms will be discussed. In a further step, this work aims to contribute to the dis- cussion of theory change and (...) scientific realism, applied to linguistic theory. After the reconstruction of further theories of linguistics, it can be studied whether certain inter theoretical relations hold. It aims to be a contribution to the discussion on the foundations of linguistics. (shrink)