On 95% Certainty...

Reader, friend, and former colleague Doug W. pointed out the image below (from Watts Up With That?), saying: “The image is stunningly effective, in my opinion.”

I agree.

The image is showing two carefully selected sections of the global average temperature record most frequently cited by the IPCC (Hadley CRUT3).  Each section is for 50 years.  One of them shows the period of time where the IPCC claims “with 95% certainly” to see the effects of anthropogenic (caused by mankind) global warming.  The other shows undisturbed nature.

Which one is which?  Can you confidently point to one and say “That's it!  That shows mankind's influence on global temperatures for sure!”

You really can't see much of a difference at all, much less one that would give you a high degree of confidence in your answer!

FYI: The one on the left is 1957 - 2008; the one one the right is 1895 - 1946.