Actually, that’s exactly what it means. Even GIGOBuster grants that the hypothesis would be falsified if we simply continue to fall short of that mark for some time longer; the only question is how much longer it needs to persist.
I’m saying we’re cooling since '98. Yes, as per the chart you’ve linked, temperatures rose tenths of a degree from the late 1850s to the late 1990s, and then dropped tenths of a degree after that, having previously dropped tenths of a degree from the late 1940s to the late 1950s, and et cetera. So what? I’m merely claiming that we’re cooling off from '98.
Well, look, imagine it’s 1998 and you know a guy who gets a raise and a promotion and – unexpectedly quits his job to start work at another company. “Kimstu,” he says, “I see great potential here; this business is going to be huge. My income will rise. It will rise, I tell you!”
And now it’s 1999. He’s still driving the same car and living in the same house; what’s more, he’s actually making less money. “Ah, it’s just the first year, settling in and finding my feet” he says; “I’ll be pulling in the big bucks before long.”
And now it’s 2000. The car looks a little dinged. The house needs repainting. He’s still not earning what he did before. “Two years? Two years is nothing. Trust me; I know what I’m doing.”
And now it’s '01. And then '02. And '03. “I know, I know; I’ve never yet made as much as I did back when. But give it time, give it time; I’m building a career, here.”
And now it’s '04. And then '05. “There, you see? I-I almost made as much money this year as I did at my old job.” And now it’s '06. “Had a bad year. It happens, you know?”
And now it’s '07. Or maybe '08. No, wait; '09. “I’m telling you, it’ll happen any day now. I’ll go back and rub it in everyone’s face, back where I used to work. It’s been a long hard slog this past decade, but it’ll pay off someday.”
There will come a point when even ardent supporters of Emperor’s New Clothes LLC will admit there’s nothing actually there; we haven’t hit it yet, but more of the same will, eventually, suffice.
Yes to #1. And yes to #2, so long as you’re including that stipulation about how twenty years of cooling might give much more doubt than ten years; I’d still like specifics on falsifiability, buy I can settle.
I’m not concerned with estimates for recent years; I want to know what will falsify the hypothesis. As for whether greenhouse gases cause warming, sure, all else being equal; I just don’t happen to think all else is necessarily equal. I’m content to chart the temperature, year after year, decade after decade – and if it keeps cooling after '98 for a second decade, then conflicting estimates or agreement with Fourier will be irrelevant.