Comment Re:Oblig xkcd (Score 1) 828
Indeed. This is the one that people don't seem to understand.
As far as I am aware, no mathematical proof has ever been offered which declares cold fusion to be impossible. This is as opposed to, say, accelerating beyond the speed of light, which has been proven to require infinite energy.
Note that I don't mean to imply that this "cold fusion" is not a fraud, but crying "Thermodynamics!" at every alternative-fuel story makes me wonder how these people would have responded to the discovery of coal.