A Perpetuum Mobile of the 2nd kind is a hypothetical device that operates without violating the laws of thermodynamics, unlike a "normal" Perpetuum Mobile, which would violate the law of energy conservation. While it's theoretically possible to create a device that operates indefinitely by converting one form of energy to another, the practical application of such a device is limited, as it would eventually run into issues with entropy and other factors.

In other words, a Perpetuum Mobile of the 2nd kind is not in conflict with energy conservation, but it is still limited by the laws of thermodynamics. So while it is possible in theory, creating a practical device that operates indefinitely without violating the laws of thermodynamics is still a significant challenge, that is not even remotely achievable as of today.
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