(Sometimes) Less is More: Mitigating the Complexity of Rule-based Representation for Interpretable Classification

• URL: http://arxiv.org/abs/2509.22384v1
• Date: Fri, 26 Sep 2025 14:13:08 GMT
• Title: (Sometimes) Less is More: Mitigating the Complexity of Rule-based Representation for Interpretable Classification
• Authors: Luca Bergamin, Roberto Confalonieri, Fabio Aiolli,
• Abstract summary: Deep neural networks are widely used in practical applications of AI, but their inner structure and complexity made them generally not easily interpretable.<n>In this work, a differentiable approximation of $L_0$ regularization is adapted into a logic-based neural network, the Multi-layer Logical Perceptron (MLLP), to study its efficacy in reducing the complexity of its discrete interpretable version, the Concept Rule Set (CRS)<n>The results are compared to alternatives like Random Binarization of the network weights, to determine if better results can be achieved when using a less-noisy technique that sparsifies the
• Score: 1.6504157612470989
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Deep neural networks are widely used in practical applications of AI, however, their inner structure and complexity made them generally not easily interpretable. Model transparency and interpretability are key requirements for multiple scenarios where high performance is not enough to adopt the proposed solution. In this work, a differentiable approximation of $L_0$ regularization is adapted into a logic-based neural network, the Multi-layer Logical Perceptron (MLLP), to study its efficacy in reducing the complexity of its discrete interpretable version, the Concept Rule Set (CRS), while retaining its performance. The results are compared to alternative heuristics like Random Binarization of the network weights, to determine if better results can be achieved when using a less-noisy technique that sparsifies the network based on the loss function instead of a random distribution. The trade-off between the CRS complexity and its performance is discussed.

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