frankly, or there is a measurement error or a cheating,
Please explain what benefit might accrue from cheating. What motive would there be? It isn't as if people get funded or otherwise rewarded for reporting a positive cold fusion result. On the contrary, that usually leads to attacks. University administrators threaten to fire the researcher; funding is withdrawn. People like you accuse the researcher of cheating. If anyone is going to cheat, it will be in the other direction. That is, the researcher will see excess heat and then cover it up with and say there is no heat, the way they did at MIT and NEDO.