... how helpful is that claim in informing us about man made global warming? The implication being of course, that some or perhaps all of the warming since then, must be natural!
How helpful is that line of reasoning? Clearly it's not wrong, but isn't the most likely explanation the increasing levels of greenhouse gasses in the atmosphere?I
Please don't get me wrong; I'm not claiming it is all down to GHG's, but is there any reason to believe that, in the absence of human influence, the world would still be warming naturally today?
If there is such reason, what is it?
Or, if we don't know, isn't cooling equally likely?
What does the data say (instrumental and proxy) and what is the best explanation?
Can you do better than simply stating some variant of "warming after the Little Ice Age"? ... which, I would suggest, is of no help at all!