David Appell showed David Evans the AGW signature from the IPCC report that Evans claimed was missing. Evans replied:
Comparing a model to observations doesn’t prove the model works. It’s encouraging to the model builders, but it’s not proof. For instance, the model could just be lucky.
So when Evans wrote:
The greenhouse signature is missing. We have been looking and measuring for years, and cannot find it.
He meant that we had found the signature, but Evans didn’t think it should count.