One who denies an assertion in a controversial political debate.(noun)
Relating to denial in a controversial political debate.(adjective)
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Use "denialist" in a sentence
"That's really at the heart of what we might call the denialist industry."
"Rather, anyone who suggests there might, repeat might, be effects other than CO2 on the climate is called a denialist (with its unpleasant connations) and any other ad hominem that springs to the mind of those who unquestioningly accept that AGW is the sole cause of climate change."
"I can tell you it's damned annoying to be an absolutely raving tree hugger (as I am,) entirely persuaded that the climate is warming and industrial civilization is the principal cause (as I am), and still to get labelled a denialist just for thinking that I or anyone should be able to scrutinize and replicate the entire process from unfiltered raw temperature or proxy data through all the data-selection, weighting, and processing steps to final output in the form of a given climatology paper's conclusions section."