Refined Verisimilitude

This monograph is unique in its kind, giving as it does an independent and self-contained introduction to the eight prominent verisimilitude proposals that make up the verisimilitude literature after the breakdown of Popper's definition in 1974. The author brings them together by comparing the ways in which they order propositional formulae. Using this method, he shows that the distinction of content and likeness definitions partitions the entire field of investigation. In addition, it is shown that the weak content definitions can be strengthened by incorporating considerations of similarity between possible worlds. The resulting refined verisimilitude definition has many desirable properties. For instance, it is the first qualitative proposal that evades the problem of truth-value dependence. In addition, in chapter five the often discussed and misunderstood problem of "language dependency" is solved. The book will be of interest to those working in the fields of logic, epistemology, philosophy of science, and (computational) linguistics.