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arXiv 1907.09124cs.LO
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基于动作的缺省推理的代数方法

An Algebraic Approach for Action Based Default Reasoning

Pablo F. Castro, Valentin Cassano, Raul Fervari, Carlos Areces

摘要:

通常,我们假设一个行为被允许仅仅是因为它没有被明确禁止;或者,类似地,一个行为被禁止仅仅是因为它没有被明确允许。这种假设出现,例如,在自治计算系统中,必须在存在管理特定场景的不完整规范集的情况下做出决策。结合对行为的默认推理和道义推理,我们可以对这些假设进行形式化的推理。考虑到这一点,我们提出了一个合乎逻辑的形式主义的默认推理的道义行动逻辑。我们方法的新颖性是双重的。首先,我们的形式主义默认推理处理行动和行动运营商,它是基于道义的行动逻辑最初提出的Segerberg。其次,受Segerberg方法的启发,我们使用来自布尔代数理论的工具。这些工具使我们能够将Segerberg的代数完备性结果扩展到缺省逻辑的设置。

英文摘要:

Often, we assume that an action is permitted simply because it is not explicitly forbidden; or, similarly, that an action is forbidden simply because it is not explicitly permitted. This kind of assumptions appear, e.g., in autonomous computing systems where decisions must be taken in the presence of an incomplete set of norms regulating a particular scenario. Combining default and deontic reasoning over actions allows us to formally reason about such assumptions. With this in mind, we propose a logical formalism for default reasoning over a deontic action logic. The novelty of our approach is twofold. First, our formalism for default reasoning deals with actions and action operators, and it is based on the deontic action logic originally proposed by Segerberg. Second, inspired by Segerberg's approach, we use tools coming from the theory of Boolean Algebra. These tools allow us to extend Segerberg's algebraic completeness result to the setting of Default Logics.

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