Search results for "conjunction"

Practicing logical reasoning through Drosophila segmentation gene mutants.

2021

Laboratory practical sessions are critical to scientific training in biology but usually fail to promote logical and hypothesis-driven reasoning and rely heavily on the teacher's instructions. This paper describes a 2-day laboratory practicum in which students prepare and analyze larval cuticle preparations of Drosophila segmentation gene mutant strains. Embryonic segmentation involves three major classes of genes according to their loss-of-function phenotypes: the establishment of broad regions by gap genes, the specification of the segments by the pair-rule genes, and the compartments within segments by the segment polarity genes. Students are asked to sort undefined segmentation mutants …

Compound conditionals as random quantities and Boolean algebras

2022

Conditionals play a key role in different areas of logic and probabilistic reasoning, and they have been studied and formalised from different angles. In this paper we focus on the de Finetti's notion of conditional as a three-valued object, with betting-based semantics, and its related approach as random quantity as mainly developed by two of the authors. Compound conditionals have been studied in the literature, but not in full generality. In this paper we provide a natural procedure to explicitly attach conditional random quantities to arbitrary compound conditionals that also allows us to compute their previsions. By studying the properties of these random quantities, we show that, in f…

Recognising mitigation: Three tests for its identification

2020

Abstract Linguistic mitigation is a pragmatic phenomenon that has been profusely treated in the literature, and yet there are few studies dedicated exclusively to offering methodological criteria for its recognition and analysis (but see Albelda, 2010 and Albelda et al., 2014). Consequently, the researcher must infer the methods for its recognition through problems arising during the analysis or through the examples and reflections offered by the authors who have addressed the issue. The purpose of this article is twofold. Firstly, to present some of the main keys for the recognition of mitigation presented by the bibliography, such as the catalogues of mitigation devices, the context, the …

Computer‐based and Face‐to‐face Collaborative Argumentation in Secondary Schools in England and Finland

2005

Abstract This article focuses on the analysis of secondary school students’ argumentative interactions in England and Finland, within specific face‐to‐face and computer‐based environments. We propose that a combination of learning environments, in conjunction with teacher input and support, is important for developing argumentation skills in the classroom. Face‐to‐face argumentation, in particular, offers ample opportunity for concentrating on the quality (through deeper exploration) of arguments; such learning can enhance the construction of well‐structured arguments often associated with some computer‐based environments, such as synchronous computer chat.

Lower and Upper Probability Bounds for Some Conjunctions of Two Conditional Events

2018

In this paper we consider, in the framework of coherence, four different definitions of conjunction among conditional events. In each of these definitions the conjunction is still a conditional event. We first recall the different definitions of conjunction; then, given a coherent probability assessment (x, y) on a family of two conditional events \(\{A|H,B|K\}\), for each conjunction \((A|H) \wedge (B|K)\) we determine the (best) lower and upper bounds for the extension \(z=P[(A|H) \wedge (B|K)]\). We show that, in general, these lower and upper bounds differ from the classical Frechet-Hoeffding bounds. Moreover, we recall a notion of conjunction studied in recent papers, such that the res…

On conditional probabilities and their canonical extensions to Boolean algebras of compound conditionals

2023

In this paper we investigate canonical extensions of conditional probabilities to Boolean algebras of conditionals. Before entering into the probabilistic setting, we first prove that the lattice order relation of every Boolean algebra of conditionals can be characterized in terms of the well-known order relation given by Goodman and Nguyen. Then, as an interesting methodological tool, we show that canonical extensions behave well with respect to conditional subalgebras. As a consequence, we prove that a canonical extension and its original conditional probability agree on basic conditionals. Moreover, we verify that the probability of conjunctions and disjunctions of conditionals in a rece…

Conjunctions (non-subordinating)

2014

'The sisters did her every imaginable injury': Power and violence in Cinderella

2012

The main aim of this article is to discuss the results achieved after investigating the presence of violence in the Grimm brothers’ <em>Cinderella</em> with the intention of finding out what kind of processes predominate in this tale and whether they can be related to violent actions. The analysis involved firstly, a study of the frequency and concordances of some words belonging to the semantic field ‘violence’, surveying in detail the context in which they appear and secondly, the analysis of transitivity processes. The method proved to be a good strategy to check whether each character’s identity and social position (power) were somehow related to the infliction of violence w…

Quasi Conjunction and Inclusion Relation in Probabilistic Default Reasoning

2011

We study the quasi conjunction and the Goodman & Nguyen inclusion relation for conditional events, in the setting of probabilistic default reasoning under coherence. We deepen two recent results given in (Gilio and Sanfilippo, 2010): the first result concerns p-entailment from a family F of conditional events to the quasi conjunction C(S) associated with each nonempty subset S of F; the second result, among other aspects, analyzes the equivalence between p-entailment from F and p-entailment from C(S), where S is some nonempty subset of F. We also characterize p-entailment by some alternative theorems. Finally, we deepen the connections between p-entailment and the Goodman & Nguyen inclusion…

Conjunction and Disjunction Among Conditional Events

2017

We generalize, in the setting of coherence, the notions of conjunction and disjunction of two conditional events to the case of n conditional events. Given a prevision assessment on the conjunction of two conditional events, we study the set of coherent extensions for the probabilities of the two conditional events. Then, we introduce by a progressive procedure the notions of conjunction and disjunction for n conditional events. Moreover, by defining the negation of conjunction and of disjunction, we show that De Morgan’s Laws still hold. We also show that the associative and commutative properties are satisfied. Finally, we examine in detail the conjunction for a family \(\mathcal F\) of t…