Complex sentence: Some deniers do endorse the term, but others often prefer the term climate change skepticism, although Haydn Washington and Saffron O’Neill have declared that "skepticism" is an inaccurate description when referring to those who deny anthropogenic global warming.
Split into simpler sentences: Some deniers do endorse the term, but others often prefer the term climate change skepticism. However several scientists researching this phenomenon have noted that "skepticism" is a misnomer and an inaccurate description when referring to those who deny anthropogenic global warming.