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arXiv · 2501.11429

The Explanation Game -- Rekindled (Extended Version)

Joao Marques-Silva·Xuanxiang Huang·Olivier Letoffe
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Abstract

Recent work demonstrated the existence of critical flaws in the current use of Shapley values in explainable AI (XAI), i.e. the so-called SHAP scores. These flaws are significant in that the scores provided to a human decision-maker can be misleading. Although these negative results might appear to indicate that Shapley values ought not be used in XAI, this paper argues otherwise. Concretely, this paper proposes a novel definition of SHAP scores that overcomes existing flaws. Furthermore, the paper outlines a practically efficient solution for the rigorous estimation of the novel SHAP scores. Preliminary experimental results confirm our claims, and further underscore the flaws of the current SHAP scores.

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Joao Marques-Silva, Xuanxiang Huang, Olivier Letoffe. 2025-02-15. The Explanation Game -- Rekindled (Extended Version). https://arxiv.org/abs/2501.11429

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