Because: 1. Mann claims tree-rings reliably show temperature for 1000 years. 2. McIntyre proves "hockey stick" graph wrong. 3. Osborn, Briffa, et. al. create "spaghetti charts" from corrected proxy data. 4. They overlay inst. data, erase divergence... "hockey stick proved!" https://twitter.com/ScottAdamsSays/status/1120686403434663936 …
You are trying to sell me on the idea that Mann's hockey stick graph was not intended to tell us where future temperatures are heading? Was it just for fun?
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The intent was only tangentially related to future predictions... those were the purview of other chapters of the IPCC. The paeloclimate chapter was tasked with proving that "current warming is unprecedented in 1000 years." Hence the MBH99 graph which expunged the MWP.
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Mann's methodology was related to historical reconstruction. If you argue it was intended to show the future that directly contradicts the abstract and methodology.
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