Contextual Agent Deliberation in Defeasible Logic

This article extends Defeasible Logic to deal with the contextual de-
liberation process of cognitive agents. First, we introduce meta-rules to reason
with rules. Meta-rules are rules that have as a consequent rules for motivational
components, such as obligations, intentions and desires. In other words, they in-
clude nested rules. Second, we introduce explicit preferences among rules. They
deal with complex structures where nested rules can be involved.