"Please, explain." Interpretability of machine learning models

In February 2019 Polish government added an amendment to a banking law that gives a customer a right to receive an explanation in case of a negative credit decision. This means that a bank needs to be able to explain why the loan wasn't granted if the decision process was automatic. In October 2018 world headlines reported about Amazon AI recruiting tool that favored men. Amazon's model was trained on biased data that were skewed towards male candidates. It has built rules that penalized résumés that included the word "women's".