Chapter 12, A Climate of Healthy Skepticism, presented signal (data) going back to just 1850 at the earliest. But there is a tremendous amount of important data directly relating to climate that has been captured in the geologic record. And, for some reason, it is simply not mentioned in this chapter.
In particular, there is a body of excellent ice core and benthic core data covering a period dating back almost 500,000 years which could extend the 160 year signal base-line described in this chapter about 2,800 times.
Moreover, this data has already been the subject of sophisticated, peer-reviewed analysis specifically related to climate variation. For example, see the paper "Variations in the Earth's Orbit: Pacemaker of the Ice Ages" appearing in Science, December 10th, 1976 and also Wikipedia with regards to the core data and Milkanovitch cycles (http://en.wikipedia.org/wiki/Milankovitc
How could this outstanding body of data and analysis, specifically addressing this issue, be ignored by Mr. Silver and (apparently) the people he talked to?
It's like looking at the last month of stock market data to check your model, but ignoring the previous 150 years.
John AM, Perth, Australia