scholarly journals Unrestrained beta reduction

2015 ◽  
pp. 257
Author(s):  
Udo Klein ◽  
Wolfgang Sternefeld

A major argument for syntactic reconstruction is based on the well-known fact that semantic reconstruction by beta-reduction is possible only if the term to be substituted for a variable does not contain any variable that would become bound as a result of substitution. This way, we derive a theoretical argument for syntactic reconstruction. However, syntactic reconstruction is not without its problems, simply because the surface form and the reconstructed form may still differ with respect to other syntactic, semantic, and information theoretic properties. This is particularly troublesome for minimalist theories which do not allow for multiple levels of representation. In this paper we propose a technique that might help to overcome these difficulties (ie. the limitation imposed by beta-reduction on semantic reconstruction) by defining a translation function T for expressions of a predicate logic L0 with lambda-abstraction into expressions of a higher-order language L1, with the desirable property that the translation of a formula in L0 is equivalent with the translation of its unrestricted reduction. In linguistic applications this will facilitate the binding of a pronoun without presupposing c-command. We will sketch a formal proof showing that unrestricted beta-reduction is a property of the target expressions in L1, the translations of L0 under T.

2013 ◽  
Vol 23 ◽  
pp. 257 ◽  
Author(s):  
Udo Klein ◽  
Wolfgang Sternefeld

A major argument for syntactic reconstruction is based on the well-known fact that semantic reconstruction by beta-reduction is possible only if the term to be substituted for a variable does not contain any variable that would become bound as a result of substitution. This way, we derive a theoretical argument for syntactic reconstruction. However, syntactic reconstruction is not without its problems, simply because the surface form and the reconstructed form may still differ with respect to other syntactic, semantic, and information theoretic properties. This is particularly troublesome for minimalist theories which do not allow for multiple levels of representation. In this paper we propose a technique that might help to overcome these difficulties (ie. the limitation imposed by beta-reduction on semantic reconstruction) by defining a translation function T for expressions of a predicate logic L0 with lambda-abstraction into expressions of a higher-order language L1, with the desirable property that the translation of a formula in L0 is equivalent with the translation of its unrestricted reduction. In linguistic applications this will facilitate the binding of a pronoun without presupposing c-command. We will sketch a formal proof showing that unrestricted beta-reduction is a property of the target expressions in L1, the translations of L0 under T.


2021 ◽  
pp. 001112872110077
Author(s):  
Stavroola A. S. Anderson ◽  
David J. Hawes ◽  
Pamela C. Snow

Research has implicated oral language deficits as risk factors for antisocial behavior. The aim of this study was to investigate the relationship between higher order language skills and youth offending through a risk, promotive and risk-based protective factor paradigm. In a sample of adolescent males ( n = 130; 13 to 20 years; 62% youth offenders) skills in understanding ambiguity, making inferences, and understanding figurative language were demonstrated to have risk and promotive effects in association with youth offending. Figurative language also met criteria for having risk-based protective effects for youth at high offending risk due to poor nonverbal skills. Conceptualization of higher order language skills through this paradigm promotes a broader frame of reference for considering theoretical models and practical interventions.


2013 ◽  
Vol 78 (3) ◽  
pp. 837-872 ◽  
Author(s):  
Łukasz Czajka

AbstractWe show a model construction for a system of higher-order illative combinatory logic thus establishing its strong consistency. We also use a variant of this construction to provide a complete embedding of first-order intuitionistic predicate logic with second-order propositional quantifiers into the system of Barendregt, Bunder and Dekkers, which gives a partial answer to a question posed by these authors.


2020 ◽  
Vol 35 (5) ◽  
Author(s):  
Jonathan Warrell ◽  
Mark Gerstein

Abstract Many models of evolution are implicitly causal processes. Features such as causal feedback between evolutionary variables and evolutionary processes acting at multiple levels, though, mean that conventional causal models miss important phenomena. We develop here a general theoretical framework for analyzing evolutionary processes drawing on recent approaches to causal modeling developed in the machine-learning literature, which have extended Pearls do-calculus to incorporate cyclic causal interactions and multilevel causation. We also develop information-theoretic notions necessary to analyze causal information dynamics in our framework, introducing a causal generalization of the Partial Information Decomposition framework. We show how our causal framework helps to clarify conceptual issues in the contexts of complex trait analysis and cancer genetics, including assigning variation in an observed trait to genetic, epigenetic and environmental sources in the presence of epigenetic and environmental feedback processes, and variation in fitness to mutation processes in cancer using a multilevel causal model respectively, as well as relating causally-induced to observed variation in these variables via information theoretic bounds. In the process, we introduce a general class of multilevel causal evolutionary processes which connect evolutionary processes at multiple levels via coarse-graining relationships. Further, we show how a range of fitness models can be formulated in our framework, as well as a causal analog of Prices equation (generalizing the probabilistic Rice equation), clarifying the relationships between realized/probabilistic fitness and direct/indirect selection. Finally, we consider the potential relevance of our framework to foundational issues in biology and evolution, including supervenience, multilevel selection and individuality. Particularly, we argue that our class of multilevel causal evolutionary processes, in conjunction with a minimum description length principle, provides a conceptual framework in which identification of multiple levels of selection may be reduced to a model selection problem.


Author(s):  
Agnieszka Pawełczyk ◽  
Emilia Łojek ◽  
Natalia Żurner ◽  
Magdalena Kotlicka‐Antczak ◽  
Tomasz Pawełczyk

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