Defensive pessimism

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Defensive pessimism, pessimism - the tendency to exaggerate the many adversities that may appear on the way to achieving the intended result. Taken to better prepare for the task.

Pessimism is one of the principles of device design. Fundamental principle in the design of nuclear facilities, in particular nuclear reactors. For example, a breakdown of devices designed to prevent breakdowns is based on more pessimistic safety studies, even if there are better documented studies with more optimistic results, etc.

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