•  17
    Another remark on connexivity and set theory
    Logic Journal of the IGPL 33 (5). 2025.
    We show that Wiredu’s result in [26] is not the doom for connexive set theories, not even for those based in logics similar to CC1, one of the original target logics. For this purpose, we present the necessary assumptions for Wiredu’s proof, making some precisions on the connexive requirements. Then we present a non-reflexive variant of CC1 in which Wiredu’s proof can be blocked. Finally, we discuss the prospects of a connexive set theory based on both the non-reflexive and non-transitive varian…Read more
  •  31
    This paper explores the problem of evaluating meta-arguments within the framework of heterogeneous logics. I introduce two new heterogeneous logics, KLP and LK3, which are based on the interpreted languages of LP and K3. I then present three distinct approaches to meta-argument evaluation, each aimed at preserving, in different ways, the heterogeneity of the underlying logics. Finally, I show that the second approach allows me to distinguish these new logics from others such as TS and ST, offeri…Read more
  •  35
    How we learned to stop worrying and love tonk
    Theoria: Revista de Teoría, Historia y Fundamentos de la Ciencia 41 (1): 5-21. 2026.
    According to common wisdom, the connective tonk defined by Prior trivializes any theory that contains it. However, it should not be forgotten that whether an argument holds or not depends to a large extent on the underlying notion of logical consequence. Logical consequence is usually assumed to be Tarskian, that is, reflexive, transitive and monotonic. However, Belnap had already conjectured that tonk might not be so problematic in a non-transitive logic, which Cook finally proved in 2005. In t…Read more
  •  256
    Another remark on connexivity and set theory
    Logic Journal of the IGPL 33 (5). 2025.
    We show that Wiredu’s result in [26] is not the doom for connexive set theories, not even for those based in logics similar to CC1, one of the original target logics. For this purpose, we present the necessary assumptions for Wiredu’s proof, making some precisions on the connexive requirements. Then we present a non-reflexive variant of CC1 in which Wiredu’s proof can be blocked. Finally, we discuss the prospects of a connexive set theory based on both the non-reflexive and non-transitive varian…Read more
  •  348
    How we learned to stop worrying and love tonk
    Theoria. An International Journal for Theory, History and Foundations of Science (NA): 1-21. 2025.
    Belnap highlighted the role of Transitivity in Prior's triviality proof involvingtonk, but a non-trivial, non-transitive logic withtonkwas never developed until Cook's proposal with four interpretations and a disjunctive consequence relation. We improve on that proposal: we show that only three interpretations suffice and that a non-disjunctive consequence relation is not required.
  •  362
    ¿Cuántas lógicas correctas hay?
    Elementos 32 (139): 9-15. 2025.
    ¿Cuándo fue la última vez que usaste la palabra «lógica»? Probablemente la usaste en una conversación cotidiana, para referirte a algo obvio o razonable. Después de todo, la mayoría de las personas cree razonar bien y entender lo evidente. Entonces, ¿para qué aprender lógica? La respuesta no es tan sencilla. Se suele decir que la lógica estudia las formas de razonamiento correcto. Pero ¿qué garantía tenemos de que cierta forma de razonamiento es realmente correcta? Actualmente, la respuesta a es…Read more
  •  600
    Empty validity all the way up: an easy road (Proceedings) (edited book, 12th ed.)
    Lomonosov Moscow State University. 2022.
    There is a tension between the definition of empty logic as a logic with no valid arguments and no valid meta-arguments, on the one hand, and the way in which we have usually interpreted the validity of meta-arguments, on the other. Here we argue that one way to eliminate the tension is understanding the “If. . . then. . . ” in a meta-argument, at least in the case of an empty logic, as a transplication (aka the de Finetti conditional) instead of an extensional or material conditional.
  •  1170
    Bunge y la validez de la adición
    In German Guerrero-Pino (ed.), Ciencia, Realismo y materialismo, Universidad Del Valle. pp. 191-202. 2022.
    En The paradox of Addition and its dissolution (1969), Mario Bunge presenta algunos argumentos para mostrar que la Regla de Adición puede ocasionar paradojas o problemas semánticos. Posteriormente, Margáin (1972) y Robles (1976) mostraron que las afirmaciones de Bunge son insostenibles, al menos desde el punto de vista de la lógica clásica. Aunque estamos de acuerdo con las críticas de Margáin y Robles, no estamos de acuerdo en el diagnóstico del origen del problema y tampoco con la manera en la…Read more
  •  463
    Cuento ganador en la categoría "Mini ficción" de la compilación "El covid no es un cuento"
  •  664
    Paraconsistencia y fundamentación de las matemáticas
    In Olga Lucía Gómez & Jairo Isaac Racines (eds.), En los limites de la ciencia y la filosofía, Universidad Del Valle. pp. 265-279. 2016.
    En "Paraconsistencia y fundamentación de las matemáticas" se reformula un aspecto del programa formalista de Hilbert, problema clásico dentro del panorama de la filosofía de las matemáticas. Lo anterior se hace desde un enfoque no clásico de la lógica, particularmente desde LP de Priest. Finalizando el articulo se rescatan las virtudes de la reformulación de este problema clásico y se evalúa hasta qué punto puede ser posible hablar del programa formalista desde la luz de la aritmética inconsiste…Read more