Denialism: what is it and how should scientists respond?
What is denialism?
"The employment of rhetorical arguments to give the appearance of legitimate debate where there is none"
What are the characteristics of denialism?
1.
Conspiracy Theories
When the overwhelming body of scientific opinion believes that something is true, it is argued that this is not because those scientists have independently studied the evidence and reached the same conclusion. It is because they have engaged in a complex and secretive conspiracy.
2.
Fake Experts
These are individuals who purport to be experts in a particular area but whose views are entirely inconsistent with established knowledge. They have been used extensively by the tobacco industry since 1974, when a senior executive with R J Reynolds devised a system to score scientists working on tobacco in relation to the extent to which they were supportive of the industrys position.
The use of fake experts is often complemented by denigration of established experts and researchers, with accusations and innuendo that seek to discredit their work and cast doubt on their motivations. Stanton Glantz, professor of medicine at the University of California, San Francisco and who has made a great contribution to exposing tobacco industry tactics, is a frequent target for tobacco denialists. He is described on the Forces website as infamous for being the boldest of liars in tobacco control that most ethically challenged gang of con artists.
3.
Cherrypicking
The third characteristic is selectivity, drawing on isolated papers that challenge the dominant consensus or highlighting the flaws in the weakest papers among those that support it as a means of discrediting the entire field.
Denialists are usually not deterred by the extreme isolation of their theories, but rather see it as the indication of their intellectual courage against the dominant orthodoxy and the accompanying political correctness, often comparing themselves to Galileo.
4.
Impossible Expectations
The fourth is the creation of impossible expectations of what research can deliver. For example, those denying the reality of climate change point to the absence of accurate temperature records from before the invention of the thermometer. Others use the intrinsic uncertainty of mathematical models to reject them entirely as a means of understanding a phenomenon.
5.
Logical fallacies
The fifth is the use of misrepresentation and logical fallacies. Logical fallacies include the use of red herrings, or deliberate attempts to change the argument and straw men, where the opposing argument is misrepresented to makeit easier to refute.
Other fallacies used by denialists are false analogy, exemplified by the argument against evolution that, as the universe and a watch are both extremely complex, the universe must have been created by the equivalent of a watchmaker and the excluded middle fallacy (either passive smoking causes a wide range of specified diseases or causes none at all, so doubt about an association with one disease, such as breast cancer, is regarded as sufficient to reject an association with any disease).
How should one respond to denialism?
Denialists are driven by a range of motivations. For some it is greed, lured by the corporate largesse of the oil and tobacco industries. For others it is ideology or faith, causing them to reject anything incompatible with their fundamental beliefs. Finally there is eccentricity and idiosyncrasy, sometimes encouraged by the celebrity status conferred on the maverick by the media.
Whatever the motivation, it is important to recognize denialism when confronted with it. The normal academic response to an opposing argument is to engage with it, testing the strengths and weaknesses of the differing views, in the expectations that the truth will emerge through a process of debate. However, this requires that both parties obey certain ground rules, such as a willingness to look at the evidence as a whole, to reject deliberate distortions and to accept principles of logic. A meaningful discourse is impossible when one party rejects these rules. Yet it would be wrong to prevent the denialists from having a voice. Instead, we argue, it is necessary to shift the debate from the subject under consideration, instead exposing to public scrutiny the tactics they employ and identifying them publicly for what they are.