What, exactly, would you accept as evidence that global warming is not occurring?

A very good question, as it happens:

in reference to:

"When confronted with the FACT that ice in Antarctica, as a whole, is on the increase, global warming alarmists fall back on what seems like a counterintuitive explanation of how warmer weather, can in fact, result in more ice. You see, warmer weather means more evaporation of ocean water, which in turn means more precipitation. Precipitation, at least over Antartica, will ALWAYS be in the form of snow (unless the planet warms a hell of a lot more than even the worst alarmists predict). More snow means more ice on the continent. And so, though it seems perverse, warmer weather is perfectly consistent with more ice on Antarctica.
The problem is, if you accept this explanation (and I do), then if Antarctica were truly melting, then it can only be because the planet is getting COOLER.
You can’t have it both ways, alarmists. Either warming causes an increase in ice, or it causees a decrease. But you guys have a long history of taking whatever WEATHER happens to be occuring, anywhere on the planet, and blaming it on global warming. If temperatures increase, it’s global warming. If temperatures decrease, it’s global warming. If ice increases, it’s global warming. If ice decreases, it’s global warming. If sea levels rise, it’s global warming. Is sea levels fall, it’s global warmng. If hurricanes increase, it’s global warming. If hurricanes decrease, it’s global warming. If the upper atmosphere warms more than the surface, it’s global warming. If the surface warms more than the upper atmosphere, it’s global warming. If species die, it’s global warming. If species thrive, it’s global warming.
So I have a question for all of you alarmists out there. What, exactly, would you accept as evidence that global warming is not occurring? Is there anything at all?
Of course, many of you alarmists might ask the opposite question of us skeptics – what would WE accept as evidence that global warming IS occurring? And I will be glad to answer that question. If we had a worldwide, geographically representative, reliably monitored, scrupulously maintained, and UNBIASED temperature record of 100 years or longer, with no “adjustments” made by “scientists” who have a dog in the fight, and that record showed that the “global average temperature” had increased by more than half a degree Celcius over those 100 years, I would accept that as evidence of global warming.
It still wouldn’t prove that the temperature increase is “unusual”, or “unprecedented”, let alone that it was “anthropogenic”. But at least you would have me convinced that temperatures are rising."
- West Antarctic ice sheet may not be losing ice as fast as once thought – GRACE readings overestimated « Watts Up With That? (view on Google Sidewiki)