Which climate argument about Medieval warming do you find most PERSUASIVE? Medieval period was warmer than now but with lower CO2 : https://bit.ly/2LP9uvE Medieval period was only warmer because of known sun activity and fewer volcanoes https://bit.ly/2RvzSjk
You can prove your point (which is not obvious to me) by showing that picking any other day of the year gives a meaningfully different result.
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