“It would vary by local weather. It’s not like every tree that lived on earth at the same time would agree ring for ring.”
Wouldn’t real scientists also use the scientific method and make sure their tree samples were found in the same location as their ice core samples?
Oh, that’s right they’re too busy counting their grant dollars to care.
That’s probably about half true.
When they started to pretend that they could create valid models of future climate, that’s when it left the realm of science and went into hocus pocus. You got more variables than equations. Any mathematician or engineer can tell you the result will be hooey.