“…The target user could be either an administrator of the system, who might want to control and improve the system behaviour; a scientist, who would like to know why and how a given result was obtained; or a decision maker, who needs to know if the system is compliant with regulations. For example, non-experts can find it difficult to interpret the mathematical formalization of all system processes executed to evaluate a query and to yield an answer, like indexing, matching, retrieval, and answer generation, while linguistic explanations of opaque FQAS, for example based on fuzzy decision trees, could help non-experts to understand the logic behind the retrieval or answer [85].…”