It's either measurement error or fraud.
http://www.freerepublic.com/focus/chat/3098613/posts?page=12#12 To: *ZX12R* That position would be more likely than fusion achieved with low voltage. ***Well, that’s fascinating. Since the PF Anomalous Heat Effect has been replicated more than 14,700 times, that requires that many links in your conspiracy chain. One might as well believe that there were 1400 assassins firing on JFK and the doctors, police, bystanders, and press were all in on the conspiracy to hide the HUGE conspiracy. Here, let me fill the bill to buy you a tinfoil hat. My real guess is that there is no anomalous heat. Just poorly trained scientists pretending to be experimentalists and not knowing how to measure nanoscopic changes in temperature measurement. ***Oh, cool. I like this one better because it can be addressed with mathematics of probability. Assuming someone who’s doing electrochemistry experiments isn’t a complete 100% dufus, the chances of error in each experiment (knowing that there’s tons of scolding for those who would make such a mistake, as already seen), would generously be 1/3. Perhaps you do not realize just how ignorant this statement is. The mathematical definition of IMPOSSIBLE is if something has a chance of 10^-50. The chance of measuring errors or noise causing false positives in replication with the 1 in 3 experiments, to be utterly magnanimous to your postulation. So for the errors/noise to account for the 14,700 replications, the chances would be 1/3 ^ 14700, which is ~10^-5000, a whopping, gigantic, HUMUNGOUS four thousand Five Hundred and fifty ORDERS OF MAGNITUDE less than impossible. I tell you what, I’ll grant you 3 levels of impossible to be “conservative” with the numbers, that is 4400 orders of magnitude less than impossible. And furthermore, there are people who are EXPERTS in determining MEASurement error — they get paid big bucks to get rid of it. National Instruments. Here’s what the Experts in MEASurement have to say about measurement error causing all this excitement: NO WAY. National Instruments is a multibillion dollar corporation that does not need to stick its neck out for “bigfoot stories”. After noting more than 150 replications, they recently concluded that with so much evidence of anomalous heat generation... http://www.22passi.it/downloads/eu_brussels_june_20_2012_concezzi.pdf Conclusion • THERE IS AN UNKNOWN PHYSICAL EVENT