[moehoward]

"Model parameters, randomly drawn to represent uncertainty in understanding, demonstrates that a forcing more negative than −1.0 W m−2 is implausible, as it implies that none of the approximately 0.3 K temperature rise between 1850 and 1950 can be attributed to northern-hemispheric forcing."

*scratching head*…So since it had little effect back then, it shouldn't be assumed to now?

[Still Thinking]

Or IOW, “That value for that parameter would tend to argue against AGW, so it can’t be right.”