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When an issue becomes a vital part of a political agenda, as is the case with climate, then the politically desired position becomes a goal rather than a consequence of scientific research.

"Climate Science: Is it currently designed to answer questions?". Richard Lindzen's remarks for Program in Atmospheres, Oceans and Climate at Massachusetts Institute of Technology, arxiv.org. September 19, 2008.
When an issue becomes a vital part of a political agenda, as is the case with climate, then the politically desired position becomes a goal rather than a consequence of scientific research.