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 …
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Replying to @ScottAdamsSays
You must be new to the discussion, then... I'll unpack it for you: 1. MBH 98/99 is a graph created by Michael Mann and popularized by Al Gore and the IPCC. It purported to show that current warming is "unprecedented in the last 1000 years," diminishing the importance of...pic.twitter.com/xcRBeqGV1r
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Replying to @NormanGYoung @ScottAdamsSays
...the medieval warm period in the popular imagination. One of the controversial hacked emails had Paul Overstreet (if I remember right) saying "we must get rid of the medieval warm period."
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Replying to @NormanGYoung @ScottAdamsSays
2. In 2003, McIntyre and McKitrick analyzed Mann's graph and found that his methodology would produce "hockey stick" graphs from mere noise. They also found many errors and discrepencies in his data.
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Replying to @NormanGYoung @ScottAdamsSays
3. In response to the criticism, Osborne, Briffa, and others (with close ties to Michael Mann) created what is known as the "spaghetti chart" which supposedly justifies Mann's earlier hockey stick graph. It does so by adding instrumental data on top of proxy data, and...pic.twitter.com/odckcMB0iI
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I'll reply again if you can find the topic, which is intent to deceive.
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