Guys claimed putting a coil of copper in the corn stove gained heat without using more fuel to maintain the room hot air temp... even after showing them the physics formulas they still claimed these huge heat gains...
I have seen this type of thinking in many things particularly on the net. People get an idea in their head and nothing you can say, demonstrate or do will change their minds. They will even admit the physics are right but still claim some magic happening taking place that makes their admitted impossibility real.
I have seen some real doozy discussions over HOH /browns gas, fuel Pellets you put in your tank, free energy and other nonsense which people are singularly minded ignorant to all evidence it is rubbish. Not only are they convinced of the fantasy, they are stupefied why anyone else should even question, let alone disparage it.
It can be quite scary sometimes how one track minded people can be on the most ridiculous beliefs when there is so much proof what they are espousing cannot physically be possible.