"So your claim that warming is an artefact of the urban heat island effect is clearly rubbish.
I suspect therefore that the corrections performed by the GISS are not as bad as you are attempting to make out. They make an urban station match the long term trend of nearby rural stations. That will correct for the urban heat island effect.
Today 07:38
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Ah yes, now the defense for data prior to urban warming being manipulated (reduced) while later data subject to not only a bit of possible urban warming is not modified and in fact while a station move resulted in instant drastic increases in reported data for reasons that should be obvious to anyone - a location no one would consider putting out their own thermometer at.
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