Presents the refereed proceedings of the First International Joint Conference on Qualitative and Quantitative Practical Reasoning. The aspects of human practical reasoning addressed in the text include: nonmonotonic logics, default reasoning, modal logics, belief function theory and fuzzy logic.

Multisensor data fusion in situation assessment processes.- Dependency mining in relational databases.- Syntactic combination of uncertain information: A possibilistic approach.- A coherence-based approach to default reasoning.- A syntactical approach to data fusion.- Some experimental results on learning probabilistic and possibilistic networks with different evaluation measures.- Information fusion in logic: A brief overview.- Focusing vs. belief revision: A fundamental distinction when dealing with generic knowledge.- Background and perspectives of possibilistic graphical models.- Checking several forms of consistency in nonmonotonic knowledge-bases.- The ?-junctions: Combination operators applicable to belief functions.- Just how stupid is postmodernism?.- Integrating preference orderings into argument-based reasoning.- Assumption-based modeling using ABEL.- Propositional quantification for conditional logic.- Fast-division architecture for Dempster-Shafer belief functions.- Graduality by means of analogical reasoning.- Reasoning about unpredicted change and explicit time.- Non-elementary speed-ups in default reasoning.- A compositional reasoning system for executing nonmonotonic theories of reasoning.- Structured belief bases: A practical approach to prioritised base revision.- Entrenchment relations: A uniform approach to nonmonotonicity.- A modal logic for reasoning about knowledge and time on binary subset trees.- How to change factual beliefs using laws and dependence information.- Using default logic for lexical knowledge.- A layered, any time approach to sensor validation.- TreeNets: A framework for anytime evaluation of belief networks.- A logically sound method for uncertain reasoning with quantified conditionals.- Belief functions with nonstandardvalues.- Error tolerance method in multiple-valued logic.- Representing and reasoning with events from natural language.- Reasoning about security: A logic and a decision method for role-based access control.- Process modeling with different qualities of knowledge.- A Fuzzy analysis of linguistic negation of nuanced property in Knowledge-Based systems.- Normative argumentation and qualitative probability.- Towards a formalization of narratives: Actions with duration, concurrent actions and qualifications.- Multiple subarguments in logic, argumentation, rhetoric and text generation.- Cactus: A branching-time logic programming language.- Creating prototypes for fast classification in Dempster-Shafer clustering.- Probabilistic default logic based on irrelevance and relevance assumptions.- Logic for two: The semantics of distributive substructural logics.- Multivalued extension of conditional belief functions.- Combining evidence under partial ignorance.- Rational Default Quantifier Logic.- Disjunctive update, minimal change, and default reasoning.- Toward a uniform logical representation of different kinds of integrity constraints.

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