I always thought the tree ring stuff was pure hogwash. I have cut a few trees in my life, having grown up on the farm and pulled my end of a five and a half foot long saw from the time I was about ten or so. I have a collection of four chain saws now. I have examined some tree rings while resting from all that exertion and I can understand that they give an indication of rainfall amounts in different years but I never understood how anyone could claim that they gave an accurate indication of temperature other than a connection between drought and high temperatures in summer. It hardly seems to be a basis for the precision they claim. They would be more credible if they just claimed psychic abilities rather than claiming to decipher all that from tree rings.
They’d be more credible if they claimed use of goat entrails.