This post is a prettied-up version of the notes for my talk at the second Cambridge Exploratory Workshop on Testing last weekend. The topic for the workshop was When Testing Went Wrong . Cold fusion is a type of nuclear reaction that, if it were possible, would provide a cheap, clean and safe form of energy. In 1989 two scientists, Fleischmann and Pons, made worldwide headlines when they claimed to have generated cold fusion in a test tube in their lab. Unfortunately, subsequent attempts to replicate their results failed, other scientists started to publicly doubt the experimental methodology, and the evidence presented was eventually debunked. Cold fusion is a bit of a scientific joke. Which means that if you are a researcher in that field - now also called Low Energy Nuclear Reactions - you are likely to have a credibility problem before you even start. And, further, that kind of credibility issue will put many off from even starting. Which is a shame because the potent...