Game-theoretic pragmatics under conflicting and common interests

This paper combines a literature overview of existing literature in game-theoretic pragmatics, with new models that fill some voids in the literature. We start with an overview of signaling games with a conflict of interest between sender and receiver, and show that the literature on such games can be classified into models with direct, costly, noisy and imprecise signals. We then argue that this same subdivision can be used to classify signaling games with common interests, where we fill some voids in the literature. For each of the signaling games treated, we show how equilibrium- refinement arguments and evolutionary arguments can be interpreted in the light of pragmatic inference.Signaling games, pragmatics, equilibrium refinements, evolutionary game theory

Strategic Vagueness and Appropriate Contexts

This paper brings together several approaches to vagueness, and ends by suggesting a new approach. The common thread in these approaches is the crucial role played by context. Using a single example where there is a conflict of interest between speaker and listener, we start by treating game-theoretic rationales for vagueness, and for the related concepts of generality and ambiguity. We argue that the most plausible application of these models to vagueness in natural language is one where the listener only imperfectly observes the context in which the speaker makes her utterances. We next look at a rationale for vagueness when there is no conflict between speaker and listener, and which is an application of Horn's rule. Further, we tackle the Sorites paradox. This paradox apparently violates standard axioms of rational behaviour. Yet, once it is taken into account that vague language is used in an appropriate context, these axioms are no longer violated. We end with a behavioural approach to vagueness, where context directly enters agents. preferences. In an application of prospect theory, agents think in terms of gains and losses with respect to a reference point. Vague predicates now allow agents to express their subjective valuations, without necessarily specifying the context.Vagueness, signalling games, decision theory, prospect theory

Dynamic Probabilistic Entailment. Improving on Adams' Dynamic Entailment Relation

The inferences of contraposition (A ⇒ C ∴ ¬C ⇒ ¬A), the hypothetical syllogism (A ⇒ B, B ⇒ C ∴ A ⇒ C), and others are widely seen as unacceptable for counterfactual conditionals. Adams convincingly argued, however, that these inferences are unacceptable for indicative conditionals as well. He argued that an indicative conditional of form A ⇒ C has assertability conditions instead of truth conditions, and that their assertability ‘goes with’ the conditional probability p(C|A). To account for inferences, Adams developed the notion of probabilistic entailment as an extension of classical entailment. This combined approach (correctly) predicts that contraposition and the hypothetical syllogism are invalid inferences. Perhaps less well-known, however, is that the approach also predicts that the unconditional counterparts of these inferences, e.g., modus tollens (A ⇒ C, ¬C ∴ ¬A), and iterated modus ponens (A ⇒ B, B ⇒ C, A ∴ C) are predicted to be valid. We will argue both by example and by calling to the results from a behavioral experiment (N = 159) that these latter predictions are incorrect if the unconditional premises in these inferences are seen as new information. Then we will discuss Adams’ (1998) dynamic probabilistic entailment relation, and argue that it is problematic. Finally, it will be shown how his dynamic entailment relation can be improved such that the incongruence predicted by Adams’ original system concerning conditionals and their unconditional counterparts are overcome. Finally, it will be argued that the idea behind this new notion of entailment is of more general relevance

Cooperative versus argumentative communication

En pragmatique, la théorie de l’usage du langage, on suppose habituellement que la communication est une affaire coopérative. Cette conception standard a été récemment attaquée par Ducrot et Merin, et il a été avancé qu’un point de vue argumentatif sur l’usage du langage naturel serait plus approprié. Dans cet article, je discute la question de savoir dans quelle mesure cette attaque est justifiée et si le point de vue alternatif peut fournir une analyse plus adéquate de la « signification pragmatique », à savoir les implicatures.In pragmatics, the theory of language use, it is standard to assume that communication is a cooperative affair. Recently, this standard view has come under attack by Ducrot and Merin, and it has been proposed that an argumentative view on natural language use is more appropriate. In this paper I discuss to what extent this attack is justified and whether the alternative view can provide a more adequate analysis of ‘pragmatic meaning’, i.e., implicatures

What comes to mind when considering looking into and/or adjusting one’s pension?:An empirical study among UK and US residents

Planning for retirement requires people to regularly examine their pension savings to see whether their plans are feasible (or still so) and whether adjustments need to be made. Little is known about how people perceive these decisions. We present the findings of a sample of US and UK participants, whom we probed for their underlying associations or motivations regarding these decisions. The findings reveal a wide range of associations that confirmed previous insights (e.g., concern for one’s future, anxiety) but also identified variables that are rarely considered in pension planning research (e.g., positive emotions and feelings). A ranking in terms of prominence indicated that the relevance of associations was very similar for both types of decisions (inspecting current pension savings and adjusting the pension plan). An exploratory regression analysis suggests, however, that the actual decisions of looking into one’s pension and adjusting it are differentially related to the underlying categories. The decision to look into one’s pension was most strongly, and positively, related to evaluation of one’s current situation. The decision to adjust one’s pension was negatively related to the category of ensuring safety and security. The main results are discussed, as well as the potential implications for pension researchers and practitioners

A Family of microRNAs Encoded by Myosin Genes Governs Myosin Expression and Muscle Performance

SummaryMyosin is the primary regulator of muscle strength and contractility. Here we show that three myosin genes, Myh6, Myh7, and Myh7b, encode related intronic microRNAs (miRNAs), which, in turn, control muscle myosin content, myofiber identity, and muscle performance. Within the adult heart, the Myh6 gene, encoding a fast myosin, coexpresses miR-208a, which regulates the expression of two slow myosins and their intronic miRNAs, Myh7/miR-208b and Myh7b/miR-499, respectively. miR-208b and miR-499 play redundant roles in the specification of muscle fiber identity by activating slow and repressing fast myofiber gene programs. The actions of these miRNAs are mediated in part by a collection of transcriptional repressors of slow myofiber genes. These findings reveal that myosin genes not only encode the major contractile proteins of muscle, but act more broadly to influence muscle function by encoding a network of intronic miRNAs that control muscle gene expression and performance