Programme

Keynote speakers

    Ofer Arieli
The Academic College of Tel-Aviv, Israel
Title: What Is An Argument? Consistency, Minimality, and Meta-Linguistic Considerations
Abstract:

We examine the notion of an argument in logic-based argumentation frameworks, arguing that some of the common requirements from arguments in this context, such as support minimality and consistency, may be waived and/or taken care of by appropriate attack rules. We then discuss various ways of handling this, as well as making preferences among arguments, by some straightforward linguistic extensions and revised attack rules.

    Katarzyna Budzynska
Warsaw University of Technology, Poland
Title:TBA
Abstract:

TBA

    Sanjay Modgil
King's College London, England
Title: Preferences in Dialectical Formalizations of Non-monotonic Reasoning
Abstract:

Argumentation enables formalization of single agent and multi-agent (distributed) non-monotonic reasoning. In this talk I will review recent work on a new dialectical approach to structured argumentation (Dialectical ASPIC+) that, under the standard Dung semantics, is fully rational under resource bounds. The approach thus improves on ASPIC+ (a general framework that has been shown to provide argumentative characterisations of various non-monotonic logics), which is only partially rational, under the tacit assumption that agents are omniscient (i.e., they Einloggenhave unlimited resources). Moreover, Dialectical ASPIC+ accommodates uses of argument that more faithfully reflect real world uses of argument, and hence rationality is not conditional on the properties of the preference relation used to determine when one argument successfully challenges (defeats) another. The talk will conclude by briefly pointing to future development of the dialectical approach so as to accommodate two generalisations of Dung's semantics that have been applied to ASPIC+; one that enables argumentation-based reasoning about preferences over arguments, and the other that provides for more fine grained evaluation of the status of arguments via graded generalizations of Dung's semantics.

    Wolfgang Spohn
University Konstanz, Germany
Title: Defeasible Normative Reasoning
Abstract:

The talk is motivated by the need of accounting for the practical syllogism (familiar since Aristotle) as a piece of defeasible reasoning. To meet the need, the talk first refers to ranking theory as an account of defeasible descriptive reasoning. It then argues that two kinds of ought need to be distinguished, purely normative and fact-regarding obligations (in analogy to intrinsic and extrinsic utilities). It continues arguing that both kinds of ought can be iteratively revised and thus can and should be represented by ranking functions, too, just as iteratively revisable beliefs. Its central proposal will then be that the fact-regarding normative ranking function must be conceived as the sum of a purely normative ranking function and an epistemic ranking function (as suggested in qualitative decision theory). This will be illustrated with the examples already discussed. The talk will close with some remarks on the prospects of turning this into joint conditional epistemic-deontic logic.

    Serena Villata
I3S research centre in Sophia Antipolis, France
Title: Towards assessing natural language argument strength: results and open challenges
Abstract:

In this talk, I will focus on the issue of automatically assessing the strength of natural language arguments, where strength is often associated to the quality of arguments and the trustworthiness of the person proposing them. I will investigate the role of machine learning and reasoning methods to tackle this issue, focusing on the real world scenarios of political debates and persuasive essays.

Accepted abstracts

Trevor Bench-Capon: Audiences and Argument Strength
Alexander Bondarenko, Maik Fröbe, Jan Heinrich Reimer and Matthias Hagen: Axiomatic Re-Ranking for Argument Retrieval
Annemarie Borg and Floris Bex: Improving Explanations by Integrating Preferences
Federico Cerutti: Preliminary Considerations for Rational Argumentation under Aleatory and Epistemic Uncertainty
Chen Chen, Liuwen Yu, Dongheng Chen, Yiqi Shen and Leendert van der Torre: A principle-based Analysis of Weakest Link in Prioritized Structured Argumentation
Pilar Dellunde, Lluis Godo and Amanda Vidal: On the use of conditional probability to model strength in logical argumentation
Alexander Duttenhöfer, Stefan Wagenpfeil, Christian Nawroth, Abbas Cheddad, Paul McKevitt and Matthias Hemmje: Supporting Argument Strength by Integrating Semantic Multimedia Feature Detection with Emerging Argument Extraction
Mariela Morveli Espinoza, Juan Carlos Nieves and Cesar A. Tacla: Measuring the Strength of Instrumental Arguments
Antonis Kakas: On the Relative Nature of Argument Strength
Zaid Marji and John Licato: Aporia: The Argumentation Game
Niki Pfeifer and Christian Fermüller: Argument Strength via Probabilistic Interpretations of Logical Support and Attack Principles
Nico Potyka: On the Relationship Between Bipolar Gradual Argumentation Frameworks and Neural Networks
Jonas Raab: Troubles with Bayesian Argumentation
Nandi Schoots and Sanjay Modgil: Using Defeasible Arguments to Update Quantified Beliefs
Kenneth Skiba: Towards Ranking Arguments in Incomplete Argumentation Frameworks
Dustin Tucker: Preordered Norms in Formal Argumentation
Emil Weydert: Hierarchic Argument Strength - A ranking semantic perspective
Anthony Young: Likes as Argument Strength for Online Debates

Detailed programme

The workshop will take place virtually in Zoom. The link will be sent to all registered participants shortly before the workshop.

Schedule (CEST timezone)

Oct 11
09:45-10:00: Welcome
10:00-11:00: Keynote: Serena Villata: Towards assessing natural language argument strength: results and open challenges
11:00-11:15: Break
11:15-11:45: Anthony Young: Likes as Argument Strength for Online Debates
11:45-12:15: Alexander Duttenhöfer, Stefan Wagenpfeil, Christian Nawroth, Abbas Cheddad, Paul McKevitt and Matthias Hemmje: Supporting Argument Strength by Integrating Semantic Multimedia Feature Detection with Emerging Argument Extraction
12:15-12:45: Mariela Morveli Espinoza, Juan Carlos Nieves and Cesar A. Tacla: Measuring the Strength of Instrumental Arguments
12:45-14:00: Lunch break
14:00-15:00: Keynote: Katarzyna Budzynska: TBA
15:00-15:15: Break
15:15-15:45: Alexander Bondarenko, Maik Fröbe, Jan Heinrich Reimer and Matthias Hagen: Axiomatic Re-Ranking for Argument Retrieval
15:45-16:15: Antonis Kakas: On the Relative Nature of Argument Strength
16:15-16:45: Zaid Marji and John Licato: Aporia: The Argumentation Game
Oct 12
10:00-11:00: Keynote: Ofer Arieli: Preferences in Dialectical Formalizations of Non-monotonic Reasoning
11:00-11:15: Break
11:15-11:45: Annemarie Borg and Floris Bex: Improving Explanations by Integrating Preferences
11:45-12:15: Jonas Raab: Troubles with Bayesian Argumentation
12:15-12:45: Federico Cerutti: Preliminary Considerations for Rational Argumentation under Aleatory and Epistemic Uncertainty
12:45-14:00: Lunch break
14:00-15:00: Keynote: Wolfgang Spohn: Defeasible Normative Reasoning
15:00-15:15: Break
15:15-15:45: Pilar Dellunde, Lluis Godo and Amanda Vidal: On the use of conditional probability to model strength in logical argumentation
15:45-16:15: Niki Pfeifer and Christian Fermüller: Argument Strength via Probabilistic Interpretations of Logical Support and Attack Principles
16:15-16:45: Nandi Schoots and Sanjay Modgil: Using Defeasible Arguments to Update Quantified Beliefs
Oct 13
10:00-11:00: Keynote: Sanjay Modgil: Preferences in Dialectical Formalizations of Non-monotonic Reasoning
11:00-11:15: Break
11:15-11:45: Trevor Bench-Capon: Audiences and Argument Strength
11:45-12:15: Chen Chen, Liuwen Yu, Dongheng Chen, Yiqi Shen and Leendert van der Torre: A principle-based Analysis of Weakest Link in Prioritized Structured Argumentation
12:15-12:45: Kenneth Skiba: Towards Ranking Arguments in Incomplete Argumentation Frameworks
12:45-14:00: Lunch break
14:00-14:30: Nico Potyka: On the Relationship Between Bipolar Gradual Argumentation Frameworks and Neural Networks
14:30-15:00: Emil Weydert: Hierarchic Argument Strength - A ranking semantic perspective
15:00-15:30: Dustin Tucker: Preordered Norms in Formal Argumentation
15:30-15:45: Closing