I would happily bet $100K that Defkalion and Rossi are/were full of sh*t. Problem is, as Thomas notes, locating a safe way to bet... also finding a chump willing to bet. I guess we'll have to settle for gloating when Rossi goes the same way as Defkalion. And Brillouin, I suspect, is not far behind.
I made a similar bet offer when the Sterling Alan crowd were crowing about a Honda Accord, converted to "HHO" gas, which made 100 mpg on a standard EPA test loop. Shoore it did. I offered $100K cash on the spot for the car if I could have it tested at any reliable test lab. Of course, I never heard from them, even though they had said they badly needed $100K to make another new and even better car.
So, OK. If anyone has an LENR reactor which makes 100W or more for a month or more continuously, (so appx 2.6e+8 Joules) without replacing fuel, total volume of the active portion (exclusive of controls and circuitry, heat exchangers and so forth) not to exceed a shoe box size, without the need for electrical connections after a reasonable starting period, or at least has a 6:1 output to input ratio by MY TEST, I will give you $100K cash on the spot for it. Fair 'nuff? Offer applies to anyone including Rossi. You must provide preliminary test data and it had better be good. And the device has to be broken down sufficiently to inspect for such things as external supply wires or tubes.