Corollary of First Law of Thermodynamics Energy can't be created or destroyed, only converted from one form to another.

Perpetual Motion Corollary

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A machine that runs forever without a fuel source does not exist, and the person selling you one knows it.

Category: Murphy's Miscellaneous Laws

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In context

This law belongs with Murphy's Miscellaneous Laws, where small assumptions, timing, and system complexity tend to turn into memorable failures.

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