It's nice to see that you are now exploring attribution these days
and at least you are attempting to find areas of ambiguity in the current attribution models that provide enough "wiggle room" to discount the role of humanity's role over natural processes. Could you possibly be "isotopious" in another venue? There is some very instructive dialogue between "iso" and Gavin Schmidt of NASA in the Real Climate website where some natural warming of the oceans since the holocene is discussed that seems so familiar to me that I have to ask. Schmidt's answer, of course, is that the natural mechanisms cannot account for but a small fraction of what is being observed, but I congratulate you on your attempts to go beyond the descriptive statistics when trying to downplay what is occurring in the climate!
