Problem Validation & Competitive Research

The problem is "decision fatigue, '' a psychological phenomenon that takes a toll on the quality of your choices after a long day of decision making, says evan polman, a leading psychologist. The problem is that each player's use indirectly interferes with the other's use and that some arrangement is necessary to reconcile both uses. Any company with more than just a few customers faces the problem of getting an overview of its customer base.

Problem applies to a question or difficulty calling for a solution or causing concern. The main problem is unemployment. He told americans that solving the energy problem was very important.

.people with mental health problems. If they judge you harshly, that’s their problem, not yours. Definition of problem noun in oxford advanced learner's dictionary.