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divergence of terminology
i guess it never occurred to you that they were polling non-scientists. the probable reason for change in terminology is for ease of understanding ... SCF is scientific lingo but "primarily caused" can be understood by anyone

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scientists are dealing from a position of ignorance themselves, and compounding the problem by sloppy or not even attempted research
none of the authors are directly involved in climatology but with communications and are all on a communications panel

they are not doing research ... it is a poll about peoples perceptions regarding climate change ... it is used for communications purposes

don;t worry you are safe ... nothing proved or disproved

do scientists do sloppy research ... read a history of science

tech check: i am guessing (you're offended if i conclude anything)based on previous posts you believe the conclusions of climate change is based on bad science and the deniers science is based on good science ... so a question wouldn't the deniers have just as good a chance of doing sloppy science as anyone else??? could you provide a list of such sloppy science from deniers(since i know you are more interested in good science)