Interjection There is a grammatical inconsistency between originally used and refers  Since the past tense is correct referred is a better word there  Id 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 PF work  Did it involve deuteriumsaturated 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 deuteriumsaturated metal  Believers of course think that the heat is real and the proposal is the correct explanation