I'm just curious, is it accepted that the universe is expanding or is that mere theory? If it is accepted, then would that be considered as something 'unlimited'? Maybe irrelevant, but I'm curious. Also is there a limit to how far we can zoom in or out? I mean looking into a telescope, or a microscope. We keep discovering further in each regard - does it ever end?
I think if one looks into history they will find that most major advances were done because someone dared to go against what was popularly believed to be true. So while we could argue infinitely about the terminology and definition of "free energy", it serves no real purpose that I can see (to argue about it).
I did a quick Google search on Tesla and I found some interesting stuff:
http://www.free-energy.ws/pdf/thermo_dynamics&fe.pdf
Maybe someone that is more educated than myself could provide a well informed opinion about that PDF. I read through it but don't understand it completely.