claim: The IPCC’s Fourth Assessment Report, 2007, carries in three places a graph in which the Hadley Center’s global mean surface temperature anomaly dataset from 1850-2005 is displayed with four arbitrarily-chosen trend-lines overlaid upon it.
evidence: This section of the report, Climate Change 2007 : The Physical Science Basis, assessed current scientific knowledge of the natural and human drivers of climate change as well as observed changes in climate.