False perfection in machine prediction: Detecting and assessing circularity problems in machine learning

• URL: http://arxiv.org/abs/2106.12417v1
• Date: Wed, 23 Jun 2021 14:11:06 GMT
• Title: False perfection in machine prediction: Detecting and assessing circularity problems in machine learning
• Authors: Michael Hagmann, Stefan Riezler
• Abstract summary: We demonstrate a problem of machine learning in vital application areas such as medical informatics or patent law. The inclusion of measurements on which target outputs are deterministically defined in the representations of input data leads to perfect, but circular predictions. We argue that a transfer of research results to real-world applications requires to avoid circularity by separating measurements that define target outcomes from data representations.
• Score: 11.878820609988695
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Machine learning algorithms train models from patterns of input data and target outputs, with the goal of predicting correct outputs for unseen test inputs. Here we demonstrate a problem of machine learning in vital application areas such as medical informatics or patent law that consists of the inclusion of measurements on which target outputs are deterministically defined in the representations of input data. This leads to perfect, but circular predictions based on a machine reconstruction of the known target definition, but fails on real-world data where the defining measurements may not or only incompletely be available. We present a circularity test that shows, for given datasets and black-box machine learning models, whether the target functional definition can be reconstructed and has been used in training. We argue that a transfer of research results to real-world applications requires to avoid circularity by separating measurements that define target outcomes from data representations in machine learning.

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