GIGO reliably informs us that a corrupted data set will always yield unreliable results. By the same token, processing and analysis of valid data (or corrupt data for that matter) which rests on erroneous assumptions or which forces an outcome is also unreliable.
The IPCC and their 1990 forecast demonstrate that for us nicely.

Note that atmospheric CO2, the “deadly greenhouse gas” which the EPA (and other regulatory bodies) seek to curb for the benefit of all mankind (or so they tell us) has steadily (as measured at Moana Loa) increased while global temperatures have done no such thing. This has been implicitly admitted by the protagonists of AGW since they now claim that their cause is not Global Warming but Global Climate Change.
While this is not surprising, given that no one has been able to accurately forecast weather more than a week out and since climate is the moving average of weather, it does tell us a lot about the credibility of those making the forecast and demanding action based on those forecasts.
It also tells us a lot about the politicians (why yes, I am talking to you Mitt Romney) and agencies (this one’s for you, EPA) which either still insist the planet is warming or which still insist that preventative actions of enormous cost must be taken to curb emissions of a naturally occurring gas which has defied the outcomes predicted by the experts and their models.
Pull the other one, it has bells on it.
Hat Tip: Clive Best via “Andy” at Ace of Spades.
UPDATED: under the fold
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