Counterfactual Metarules for Local and Global Recourse

• URL: http://arxiv.org/abs/2405.18875v1
• Date: Wed, 29 May 2024 08:35:17 GMT
• Title: Counterfactual Metarules for Local and Global Recourse
• Authors: Tom Bewley, Salim I. Amoukou, Saumitra Mishra, Daniele Magazzeni, Manuela Veloso,
• Abstract summary: T-CREx is a model-agnostic method for local and global counterfactual explanation. It summarises recourse options for both individuals and groups in the form of human-readable rules.
• Score: 19.566362530518717
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We introduce T-CREx, a novel model-agnostic method for local and global counterfactual explanation (CE), which summarises recourse options for both individuals and groups in the form of human-readable rules. It leverages tree-based surrogate models to learn the counterfactual rules, alongside 'metarules' denoting their regions of optimality, providing both a global analysis of model behaviour and diverse recourse options for users. Experiments indicate that T-CREx achieves superior aggregate performance over existing rule-based baselines on a range of CE desiderata, while being orders of magnitude faster to run.

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