Towards Incorporating Human Knowledge in Fuzzy Pattern Tree Evolution

This paper shows empirically that Fuzzy Pattern Trees (FPT) evolved using Grammatical Evolution (GE), a system we call FGE, meet the criteria to be considered a robust Explainable Artificial Intelligence (XAI) system. Experimental results show FGE achieves competitive results against state of the art black box methods on a set of real world benchmark problems. Various selection methods were investigated to see which was best for finding smaller, more interpretable models and a human expert was recruited to test the interpretability of the models found and to give a confidence score for each model. Models which were deemed interpretable but not trustworthy by the expert were seen to be outperformed in classification accuracy by interpretable models which were judge trustworthy, validating that FGE can be a powerful XAI technique.