Abstract

Raul Orayen's book _Lógica, significado y ontología_ is a deep study into a range of issues in the philosophy of logic, taking Quine as the main interlocutor. It goes into subjects such as Truth-bearerss, Logical Truth, Validity, Propositions, Quine's Extensionalism, Relevant Logic and disjunctive syllogism, and Castañeda's ontology of Guises.