Walkback or Walkabout?

The indispensable one, boxed into a corner by Roger Pielke, Jr., and  The Breakthrough Institute, does something rare:

Yes, my thinking on rip-offsets has evolved, primarily because I have spent the last few months talking to leading experts, domestic and international, including the chief climate negotiator for a major European country.

As one reader to Climate Progress noted,

‘Evolved’ is an interesting way of putting it.