We have some questionable «post modern» science built on shaky foundations that assumes we have a much greater knowledge of the
historic record than we do, or assumes that the
historic record - such as
sea surface temperatures to 1850 - are a rock solid piece of science from which an edifice can be constructed.
Such as another fascinating paper by Don J. Easterbrook, Professor Emeritus in the Deptment of Geology at Western Washington University: «Solar Influence on Recurring Global, Decadal, Climate Cycles
Recorded by Glacial Fluctuations, Ice Cores,
Sea Surface Temperatures, and
Historic Measurements Over the Past Millennium» — Hat tip to Anthony Watt's Watts Up with That.