我也覺得永動機不是完全没有可能，但不會在經典物理的框架内。

量子層面有許多"無缘無故''的現像. These effect-without-cause (cause hidden) phenomena touch some fundamental aspects regarding the very nature of physical existence. The play of energy may have a very different function here. Who can decide that energy jumping out from nowhere can not be a consequence of some deeper broader conservation law? But I also believe if someday human physics operates at such a degree of subtlety, we no longer need infinite energy. We probably won't even need a lot of energy.

Within the framework of classical physics it is well understood that the perpetual motion machine can not be constructed. It is like saying that it is impossible to fly an ordinary air plane to the moon. It isn't a result of brainwash but a thorough understanding that the ordinary plane can only fly in air.