Climate deniers - people who don't believe that climate change is happening, or that it isn't caused by humans - make up around nine percent of the American population, according to some estimates.
Professor van der Linden advises us not to challenge climate deniers directly, and never to throw insults – to say offensive, hurtful things directly to someone.
He has long been concerned about the authoritarian right but says it is reasonably well understood (democracy-deniers and all), whereas the intellectual history of the authoritarian left is " oddly unexplored territory" .
So long as the priest, that professional denier, calumniator and poisoner of life, is accepted as a higher variety of man, there can be no answer to the question, What is truth?
(Applause) XB: It is true that we increasingly face criticism, and it's not only when we speak to people, with climate deniers or things like that, but also on social media.
Because while I mentioned earlier that deniers who ran for chief election officer in swing states lost, there are still significant numbers of them on the state and local level.