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Workshop “Argument Strength”

Arguments vary in strength. The strength of an argument is affected by e.g. the plausibility of its premises, the nature of the link between its premises and conclusion, and the prior acceptability of the conclusion.

The aim of this workshop is to bring together experts from the fields of artificial intelligence, philosophy, logic, and argumentation theory to discuss questions related to the strength of arguments. Such questions include:

Keynote speakers

  • Gerhard Brewka (University of Leipzig)
  • Dov Gabbay (Kings College, London; Ashkelon Academic College):
    Distortions in argument strength generated in the reasoning of sex offenders (Research with Gadi Rozenberg, Ashkelon Academic College)
  • Gabriele Kern-Isberner (TU Dortmund)
  • Beishui Liao (Zhejiang University):
    Probabilistic argumentation and its computation — A survey
  • Henry Prakken (Utrecht University)
  • Leon Van Der Torre (University of Luxembourg)

Abstract submission

Authors are invited to submit an abstract (500-1000 words) related to the above or any other questions on the topic of argument strength to by August 1, 2016.

Important dates

  • submission deadline: August 1, 2016
  • notifications: September 1, 2016
  • submission of revised abstracts: October 15, 2016
  • workshop: November 30 - December 2, 2016

Preliminary program

  Wednesday, November 30th, 2016
13:30 – 14:00 Registration and welcome
14:00 – 15:00 Henry Prakken
  Argument Strength and Probability
15:00 – 15:30 Adam Purtee and Lenhart Schubert
  Simple Rules for Probabilistic Common Sense Reasoning
15:30 – 16:00 Coffee Break
16:00 – 16:30 Elise Bonzon, Jérôme Delobelle Sébastien Konieczny, Nicolas Maudet
  Argumentation ranking semantics based on propagation
16:30 – 17:00 Leila Amgoud, Jonathan Ben-Naim, Dragan Doder, Srdjan Vesic
  On the notion of compensation between number and strength of attackers in ranking-based semantics
17:00 – 18:00 Gabriele Kern-Isberner
  [ title TBA ]
  Thursday, December 1st, 2016
9:00 – 10:00 Leon van der Torre
  [ title TBA ]
10:00 – 10:30 Sjur Dyrkolbotn, Truls Pedersen, Jan Broersen
  On the possibility of rational indifference in abstract argumentation with structured arguments
10:30 – 11:00 Coffee break
11:00 – 11:30 Chenwei Shi, Sonja Smets
  Modeling the strength of arguments in dynamic epistemic probabilistic logic
11:30 – 12:00 Paweł Łupkowski, Mariusz Urbański
  The influence of an agent’s credibility on the questioning agenda in a multi-agent environment
12:00 – 12:30 Massimiliano Carrara, Daniele Chiffi, Ciro De Florio
  Reasoning with assertions and hypotheses in pragmatic logic
12:30 – 14:00 Lunch Break
14:00 – 14:30 Roberto Confalionieri, Oliver Kutz, Tarek R. Besold, Rarael Penaloza, Daniele Porello
  Argumentation, coherence, and blending
14:30 – 15:00 Thomas F. Gordon and Douglas Walton
  Formalizing Balancing Arguments
15:00 – 15:30 Robin E Bloomfield, Kate Netkachova
  Argument strength – an engineering perspective
15:30 – 16:00 Coffee Break
16:00 – 16:30 James Freeman
  Comparative Argument Strength: A Formal Inquiry
16:30 – 17:30 Gerhard Brewka
  [ Title TBA ]
  Friday, December 2nd, 2016
9:00 – 10:00 Dov Gabbay
  Distortions in argument strength generated in the reasoning of sex offenders
10:00 – 10:30 Corina Andone, Florin Coman-Kund
  The importance of argument strength in policy-making: the case of European Union directives
10:30 – 11:00 Coffee break
11:00 – 11:30 Leila Amgoud and Jonathan Ben-Naim
  Axiomatic Foundations of Argument Evaluation
11:30 – 12:00 Marcin Selinger
  Argument evaluation based on proportionality
12:00 – 12:30 Vlasta Sikimić
  How specific arguments defeat general dogmas: lack of parsimony in molecular biology
12:30 – 14:00 Lunch break
14:00 – 14:30 David Godden and Frank Zenker
  A probabilistic analysis of argument cogency
14:30 – 15:00 Carlo Proietti
  Group polarization and argument strength
15:00 – 15:30 William Peden
  The Ellsberg paradox and the weight of arguments
15:30 – 16:00 Coffee break
16:00 – 16:30 Gabrielle Pigozzi and Leon van der Torre
  Arguing about constitutive and regulative norms
16:30 – 17:30 Beishui Liao
  Probabilistic argumentation and its computation — A survey

Venue and how to get there

Getting from Bochum Hauptbahnhof to the Ruhr-University Bochum

From Bochum Hauptbahnhof (central station) take the U35 towards Bochum Querenburg (Hustadt) and get out at stop “Ruhr Universität”. (Ticket needed: Preisstufe A, €2,60). On weekdays the subway U35 leaves every 5 minutes and reaches the university within 9 minutes.

Getting from the U-Bahn stop “Ruhr Universität” to Beckmanns Hof

On Wednesday and Thursday (November 30 and December 1) the workshop will take place at Beckmanns Hof, Ruhr-Universität Bochum, Germany. Beckmanns Hof is located on Campus behind the Mensa. A map of the campus can be found here: campus map.

From the train station of the U-35 (“Ruhr-Universität”) go up the pedestrian bridge, turn right from the exit and walk towards the university. Your route takes you directly to the building of the university library. Keep walking till you pass the University library on your right, and continue until you reach the University “Mensa” building. Pass by the “Mensa” by walking down stairs, cross a campus street and a parking lot, and further walk down to the Beckmanns Hof.

Getting from the U-Bahn stop “Ruhr Universität” to the SSC building

On Friday (December 2) the workshop will take place in the building called SSC, which is located on Campus as well. See also the campus map.

From the train station of the U35 (“Ruhr-Universität”) go up the pedestrian bridge, turn right from the exit and walk towards the university. Turn left before the first building on your left, then walk straight towards the SSC building.

Travel recommendations for long-distance and air travellers

Bochum Hauptbahnhof (central station) is served by ICE, IC, EC, regional and suburban trains at a high frequency. From there, you can reach the University easily by taking underground line U35 straight to the stop Ruhr-Universität. Four airports - Dortmund, Münster/Osnabrück, Cologne/Bonn and Düsseldorf - are within a reasonable distance of the Ruhr-Universität. Düsseldorf Airport, however, is not only the largest, but also the most easily accessed: there are direct connections between the airport and Bochum’s main train station up to eight times per hour, and the journey only takes a good half an hour.

Getting from Düsseldorf Airport to Bochum Hauptbahnhof

Upon arriving at the airport follow the signs to the DB (Deutsche Bahn) train station. Buy your train ticket to Bochum (Ticket needed: Preisstufe D, €14,60) at the airport before boarding the monorail which takes you to the train station. There are trains travelling directly to Bochum Hauptbahnhof frequently and the trip takes about 35 to 45 minutes depending on which train you take. The ticket Preisstufe D is a ticket provided by the public transportation system VRR and it is only valid in regional trains and S-Bahn. If you take an ICE, IC or EC you need a more expensive ticket for long-distant trains.

Getting from Dortmund Airport to Bochum Hauptbahnhof

Take the shuttle bus from the Airport Terminal to Holzwickede train station. From Holzwickede you take the train to Dortmund Hauptbahnhof (central station) and then change trains to Bochum Hauptbahnhof.

Organizing committee

  • tiny_mathieu.beirlaen.jpg Mathieu Beirlaen,
  • annemarietiny.jpg AnneMarie Borg,
  • tiny_jesse.heyninck.jpg Jesse Heyninck,
  • pere.jpg Pere Pardo,
  • tiny_dunja._e_elja.jpg Dunja Šešelja
  • tiny_christian.stra_er.jpg Christian Straßer


The workshop is organised by the Research Group on Non-monotonic Logic and Formal Argumentation at the Faculty for Philosophy II, Ruhr-University Bochum.

The workshop is supported by the Sofja Kovalevkaja award of the Alexander von Humboldt-Foundation (funded by the German Ministry for Education and Research) and by the Ruhr University Research School PLUS (funded by Germany’s Excellence Initiative [DFG GSC 98/3]).

Author: Research Group for Non-Monotonic Logics and Formal Argumentation

Created: 2016-10-11 Tue 10:57