The real reason why micheal mann hockey stick graph switched from tree rings...

[Wyatt earp]

From proxys to modern technology..The answer is obvious on the curve.

 

[Crick]

Can you explain why you would WANT to see proxy data when instrumented data is available? And for those periods when instrumented data are not available, can you provide a better method for determining temperature than the use of proxies?

Since the answer to both those questions will be no, can you explain what point you're trying to make? Oh... wait. You just needed an excuse to use this image. Got it.