AGW and Internal Non-Coherence

From National Review:

Roy Spencer, a former senior scientist for climate studies at NASA’s Marshall Space Flight Center, described the shift in opinion on his blog:

For many years we had been hearing from the “scientific consensus” side that natural climate change is nowhere near as strong as human-caused warming . . . yet the lack of surface warming in 17 years has forced those same scientists to now invoke natural climate change to supposedly cancel out the expected human-caused warming!