Interjection There is a grammatical inconsistency between originally used and refers Since the past tense is correct referred is a better word there I d also like to point out that the part about Prof Jones is a bit unclear What experiment did he do that was different from the P F work Did it involve deuterium saturated metal If so then technically there is little significant difference today cold fusion is basically the description of a proposed explanation for the apparent appearance of heat in experiments that involve deuterium saturated metal Believers of course think that the heat is real and the proposal is the correct explanation