BartSimpson BartSimpson:
AGW must be valid and true all the time in every circumstance or else it is not valid and true.
If it is only valid during the summer then the most likely cause of heat would be summer.
AGW is a theory. All that it need be is more applicable than any other existing theory. "truth in science" is a yet another propagnada tool invented by the (primarily Christian) right to attack science (witness, for example, the junksceince.com contest to "prove" climate change). Natural science is about probabilities and uncertainties; there are no absolute truths.
For the theory to remain valid, it must, as you say, explain every real phenomenon, otherwise the theory must be discarded or changed. The theory of climate change is that the imapct of heat being reradiated groundward due to an increase of CO2 and other greenhouses gases is making the planet warmer over the long term.
$1:
AGW proponents don't get the intellectual right to claim that unusual instances of warming are attributable to AGW while conveniently ignoring unusual instances of cooling.
Correct, they do not.
$1:
You other folks here are making the point that Sasquatch has repeatedly made that AGW proponents cherry pick their "evidence" by ignoring or discounting cooling trends and events.
Yes, Fiddledog made the same claim, but couldn't really back it up. How do you reconcile your position with the observation that he vast majority of scientists doing research in relavent fields disagree wiht you? The current warming and current CO2 concentrations does not fit any known trends in any of the time scales it is being measured on, or in any of the known patterns of history, according to most researchers.
$1:
It is completely counterintuitive and it is completely silly on first blush, but if you're going to argue in favour of AGW at all then you MUST consistently attribute AGW effects to all unusual weather events.
Agreed. The climate change theory must match observatiosn and must have predictive ability in order for it to remain a valid theory. So far, though, no one has been able to knock it off its perch.