Debugging using Orthogonal Gradient Descent

Narsimha Chilkuri; Chris Eliasmith

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arXiv · 2206.08489

Debugging using Orthogonal Gradient Descent

Narsimha Chilkuri·Chris Eliasmith

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Abstract

In this report we consider the following problem: Given a trained model that is partially faulty, can we correct its behaviour without having to train the model from scratch? In other words, can we ``debug" neural networks similar to how we address bugs in our mathematical models and standard computer code. We base our approach on the hypothesis that debugging can be treated as a two-task continual learning problem. In particular, we employ a modified version of a continual learning algorithm called Orthogonal Gradient Descent (OGD) to demonstrate, via two simple experiments on the MNIST dataset, that we can in-fact \textit{unlearn} the undesirable behaviour while retaining the general performance of the model, and we can additionally \textit{relearn} the appropriate behaviour, both without having to train the model from scratch.

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Narsimha Chilkuri, Chris Eliasmith. 2022-06-17. Debugging using Orthogonal Gradient Descent. https://arxiv.org/abs/2206.08489

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