Accelerate the World's Transition to Sustainable Energy - to fight Anthropogenic Climate Change, page-31351

How about you answer the question first as it applies to all homogenised data. I just gave an extreme example to make the point.

Data validity and the extent to which you can change it, IF AT ALL, before it becomes totally invalid to use scientifically speaking is the question.

I suggest to you the climate mob have overlooked this 'science' problem.