Semantics and science....
No one can ever prove perpetual motion, because for something to run forever you have to get to the end of forever... make sure you deposit your penny for Millyway's. (The resteraunt at the end of the universe) The trick here is realizing the difference between a silly concept and possibly beneficial long lived devices.
What most of these devices don't do now, is put out more power than the cost of construction and maintenance. Also as has been said they don't overcome friction and resistance. Electromagnetic fields cause resistance. Bearings cause friction, lubrication for the bearings reduces friction and increases life of product but also introduces resistance. A vaccuum simply reduces the air coefficient but does nothing to curb the effect of gravity which is the real killer in this situation, not counting the electromagnetic resistance created by power generation.
The trick to defeating the paradigms is by defeating the problems surrounding them. There is no one technology to use, it will likely take several working in concert.
Back in the day there was a concept developed for maglev trains called static clusters. Basically using static rare earth type magnets to do the levitation work. Imagine a stator with no bearings. Still have gravity to content with, but nothing to wear out except magnet life. Now imagine a stator the size of a maglev train with no bearings. The question is how long will the magnets live and will enertia destroy it?
Now you have to move it. Magnetic motors don't live very long. They do spin, but they don't last long enough to be cost effective. Resistance devastates them. The magnets die because they repolarize when in a constant pull or push with other magnets. Hydro is an option, it would take far less water force to move the stator than a traditional bearing.
Now the trick here is the magntic field you create generating electricity causes resistance which slows you down. Imagine sampling that current instead of a constant draw. Much like Karpen's pile it draws a bit then allows the stator to resume speed then draws again.
Moderation in all things. When you run into a wall look for a way around it.
Remember always that Tesla was told he would never create an alternating current motor because it was impossible. If not for him we might not be posting on this forum sharing ideas. The company I used to work for had a saying. "Impossible just takes longer."
It definitely is a dream with a host of problems to overcome, but if not for dreamers most of the technology we have today wouldn't exist.
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