When it comes to denying “Free Energy”, we can’t have it both ways, namely: we can’t deny its existence on the one hand and then claim in practically the same breath that electrical engineering can substantiate the existence of a major portion of their job description, namely: “balancing the load” on the electric utility grid by resorting to mathematical equations which make use of imaginary numbers. Renee Descartes sneered in derision at the square root of negative one by stigmatizing it with a term that has stuck to it to this day, namely: “imaginary”, as in: wishful thinking! Yet, over a century of “street-wise” expertise affords us numerous testimonials of how useful this illusive number is. So, who’s complaining? I am every time someone objects to my promotion of the colloquialism known among laypeople as “free energy” (getting more energy from less energy) by my use of standard electrical engineering to explain, without substantiation, its existence.
https://en.wikibooks.org/wiki/Free_Energy_does_not_Exist