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Theory of Reasoning

Class at Faculty of Arts |
ALGV00037

Syllabus

Non-monotonic reasoning

Classical consequence

Basic properties of classical consequence (reflexivity, cumulative transitivity, monotony)

Compactness and maximalizability property

Supraclassicality and paraclassicality

Uniform substitution

How to get more

Additional background assumptions

Pivotal-assumptions

Default-assumptions (cautious monotony, non-compactness)

Restrictions of the set of models (valuations)

Pivotal-valuations (non-compactness, definable sets of valuations)

Default-valuations (preferential models, consistency preservation, non-monotonicity, non-transitivity, cautious monotony for well-founded relations on models, not consistency preservation)

Additional background rules

Pivotal-rules (neither disjunction in the premisses nor contraposition)

Default-rules

Default logic

Default rules

Default theories

Operational semantics (process, extension)

General properties (consistency preservation, cautious monotony)

Normal default theories (existence of extensions, monotony in defaults, orthogonalitz of extensions)

Representation in normal default theories (non-normality required)

Semi-normal default theories

Proof theory for default logic

Joint consistency of justifications

Modified extensions

Priorities among defaults

Annotation

Most influential approaches to representational issues concerning nonmonotonic reasoning, commonsense reasoning and other nondeductive kinds of reasoning including uncertain reasoning.