arXiv:2503.01792cs.AI2025-03AAAI被引 9

生成符合时间约束的反事实解释,让AI决策更可信可懂。

Generating Counterfactual Explanations Under Temporal Constraints

  • 用线性时序逻辑建模时间规则,指导生成过程
  • 生成的反事实解释100%符合时间约束条件
  • 适合流程挖掘、医疗诊断等有时间依赖的场景

反事实解释是可解释人工智能的重要技术,通过修改输入数据来改变预测结果,获得更优结局。现有方法难以应用于流程挖掘等时序领域,因为其生成的反事实可能违反时间背景知识,导致解释不一致。本文提出一种新方法,将线性时序逻辑在流程轨迹上的表达(LTLp)与遗传算法结合,确保生成的反事实始终符合预设的时间规则。实验表明,该方法生成的反事实具有时间合理性,且在涉及时序依赖的应用中更具可解释性。

原文摘要 · Abstract (English)

Counterfactual explanations are one of the prominent eXplainable Artificial Intelligence (XAI) techniques, and suggest changes to input data that could alter predictions, leading to more favourable outcomes. Existing counterfactual methods do not readily apply to temporal domains, such as that of process mining, where data take the form of traces of activities that must obey to temporal background knowledge expressing which dynamics are possible and which not. Specifically, counterfactuals generated off-the-shelf may violate the background knowledge, leading to inconsistent explanations. This work tackles this challenge by introducing a novel approach for generating temporally constrained counterfactuals, guaranteed to comply by design with background knowledge expressed in Linear Temporal Logic on process traces (LTLp). We do so by infusing automata-theoretic techniques for LTLp inside a genetic algorithm for counterfactual generation. The empirical evaluation shows that the generated counterfactuals are temporally meaningful and more interpretable for applications involving temporal dependencies.

反事实解释时序约束流程挖掘

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