In order to make their hypothesis that human CO2 is causing global warming work, a small group at or associated with the Climatic Research Unit (CRU) used the Intergovernmental Panel on Climate Change (IPCC) to ignore or rewrite data, create false mechanisms, misuse science and the scientific method. One sign of malfeasance is if the claim is made from computer model output. A second sign is a design to overthrow an existing explanation without adequate proof it is inadequate. An almost guaranteed sign is a combination of both.