wicked problem
problem that is difficult or impossible to solve because of incomplete, contradictory, and changing requirements that are often difficult to recognize
en-GB/ˈwɪkɪd ˈpɹɒbləm/
en-US/ˈwɪkɪd ˈpɹɑbləm/
problem that is difficult or impossible to solve because of incomplete, contradictory, and changing requirements that are often difficult to recognize