Semantics


J.M. SAGÜILLO (Universidad Santiago de Compostela)

One of the multiple meanings of the word ‘information’ is given implicitly in the postulates and conditions of information-theoretic logic (I-T-L). The tradition of looking at logical phenomena from an informational stance goes back as far as the XIX century. Logicians such as Boole, De Morgan, Jevons, and Venn already suggested that deducing is a sort of unpacking the information already contained in given premises. In the XX century this tradition is recovered by Carnap and Bar Hillel, Cohen and Nagel, and more recently by Corcoran. John Corcoran has articulated a specific information-theoretic viewpoint of logic with its own particular characteristics. I intend to explain the basic ideas of I-T-L by motivating their philosophical underpinnings. One desideratum is to complement and to shed light on some of the philosophical shortcomings of the nowadays paradigmatic model-theoretic concept of logical consequence. Another is to provide a brief sample of questions to be newly addressed form the I-T-L, such as insufficiency as well as redundancy of information in a given axiom-set.

Article

Gemma ROBLES (Universidad La Laguna)

In a standard sense, consistency and paraconsistency are understood as, respectively, the absence of any contradiction and as the absence of the ECQ (“E contradictione quodlibet”) rule that allows us to conclude any well formed formula from any contradiction. The aim of this paper is to explain the concepts of weak consistency alternative to the standard one, the concepts of paraconsistency related to them and the concept of strong paraconsisteny, all of which have been defined by the author together with José M. Méndez.

Article

J.R. ÁLVAREZ BAUTISTA (Universidad de León)

This work considers complementary attempts to handle both nature and culture from the derived perspectives of two types of sciences: semiotics and natural sciences. It may be considered as a critical attempt to place both of them in their proper space: on the one hand, the initiatives of the so called Biosemiotics (in which causality and signification are purportedly unified in the idea of communication in the whole biosphere); on the other hand, the theory of cultural selection -which most remarked version is the well known Memetics (an application into cultural frames intendedly analogue to the theory of natural selection). The former is a semiotization of biology at the cost of a previous naturalization of semiotics itself, while the second one is a naturalization of the cultural space in terms of the “universal Darwinism” which implies the application of the selection idea (mechanism, algorithm, etc.) to cultural dynamics, mediated by the idea of information.
The thesis here to be defended amounts to consider Biosemiotics -presented as an analytical method to study communication- as ontologically founding communication in causality. Meanwhile Memetics -presented as an application of methodology to selection of cultural processes of production, diffusion and conservation of unities and complex aggregates of information- studies cultural causality in the frame of communicative efficiency.

Article

Margarita VÁZQUEZ (Universidad La Laguna)

In this paper, I analyze the paradox called “The surprise exam paradox” or “The unexpected hanging paradox”. I study some interpretations of this paradox, like Quine and Ned Hall ones, and give my own view about its solution, making some approaches from classical logic and from temporal or epistemic logics.

Article

Carlos AGUILAR, Lydia SANCHEZ & Manuel CAMPOS (Universidad de Barcelona)

This paper presents a mathematically solid framework for the study of audio-visual contents based on the development by Keith Devlin of situation theory. In order to obtain this framework, we present accounts of the processes carried out by agents from the reception of the audio-visual content to the extraction of information, in accordance with the definition by Israel and Perry. We finally justify why these accounts concerning the extraction of information from audio-visual content can be included as part of a mathematical formulation of situation theory.

Article

Julio OSTALÉ (Universidad de Salamanca)

Semantic information is analysed by means of two consecutive approaches. Firstly, we consider semantic information via ordinary-language reports of the form “X carries the information that Y”. Secondly, and partially based on the previous analysis, we obtain a number of a priori conditions a physical system has to fulfill for semantic information to take place in such a system.

Article

Anto FLORIO (Universidad del País Vasco)

After a concise introduction about the idea of correspondence and correlation, in the first part of the paper two notions of information are grasped by the analysis of Situations Semantic and Situation Theory. The first is that of correlation, the second that of constraint; the latter is reducible to the former. More than that, the phenomenon of “alethic nature of information” is highlighted, a clear concept of information is gained and the nutshell of any possible “informational theory of truth” is point out. In the second part, an informational epistemological synthesis and lecture of language is propounded. The difference between a meaning-oriented language and an informational-oriented language is outlined and ‘messages’ are recognized as being the atomic constituents of language. In the conclusion the attention is focused on naturalized epistemology of information and language.

Article

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