What was the temperature in Philadelphia when the Declaration of Independence was signed on July 4th of 1776?
You couldn’t get an accurate answer to this question even if you could resurrect all of the signatories of the Declaration today and ask them this question. Instead, you would learn that the temperature was one of the following: (1) hot, (2) very hot, (3) kind of mild, or (4) unseasonably cool. That’s it. Good luck with that “science.”
Yes; temperatures are estimated from the study of tree rings. Older studies were based upon tree rings manually extracted from the trees which included the possibility of the rings being compacted or elongated from the process. Jan Esper instead used ultra high definition x-rays which allowed the rings to be studied down to the molecular level.
While it is impossible to determine what the temperature was on a given day and a given year it is possible to estimate the relative temperature of a given year relative to past and present years.
Given that political activists masquerading as scientists are attempting to force their theories of man-made global warming down our throats, as an excuse to impose their marxist agenda, we can use science to counter their absurd claims.