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In decision theory and general systems theory, a mindset is a set of assumptions, methods, or notations held by one or more people or groups of people that is so established that it creates a powerful incentive within these people or groups to continue to adopt or accept prior behaviors, choices, or tools. This phenomenon is also sometimes described as mental inertia, “groupthink”, or a “paradigm”, and it is often difficult to counteract its effects upon analysis and decision making processes.