The assuming an authority of dictating to others, and a forwardness to prescribe to their opinions, is a constant concomitant of this bias and corruption of our judgments. For how almost can it be otherwise, but that he should be ready to impose on another’s belief, who has already imposed on his own? Who can reasonably expect arguments and conviction from him in dealing with others, whose understanding is not accustomed to them in his dealing with himself? Who does violence to his own faculties, tyrannizes over his own mind, and usurps the prerogative that belongs to truth alone, which is to command assent by only its own authority, i.e. by and in proportion to that evidence which it carries with it.
As a philosophy professor who focuses on the practical value of philosophical thinking, one of my main objectives is to train students to be effective critical thinkers. While true critical thinking has been, ironically, threatened by the fact that it has become something of a fad, I stick with a very straightforward and practical view of the subject. As I see it, critical thinking is the rational process of determining whether a claim should be accepted as true, rejected or false or subject to the suspension of judgment. Roughly put, a critical thinker operates on the principle that the belief in a claim should be proportional to the evidence for it, rather than in proportion to our interests or feelings. In this I follow John Locke’s view: “Whatsoever credit or authority we give to any proposition more than it receives from the principles and proofs it supports itself upon, is owing to our inclinations that way, and is so far a derogation from the love of truth as such: which, as it can receive no evidence from our passions or interests, so it should receive no tincture from them.” Unfortunately, people often fail to follow this principle and do so in matters of considerable importance, such as climate change and vaccinations. To be specific, people reject proofs and evidence in favor of interests and passions.
Despite the fact that the scientific evidence for climate change is overwhelming, there are still people who deny climate change. These people are typically conservatives—although there is nothing about conservatism itself that requires denying climate change.
While rejecting the scientific evidence for climate change can be regarded as irrational, it is easy enough to attribute a rational motive behind this view. After all, there are people who have an economic interest in denying climate change or, at least, preventing action from being taken that they regard as contrary to their interests (such as implementing the cap and trade system on carbon originally proposed by conservative thinkers). This interest would provide a motive to lie (that is, make claims that one knows are not true) as well as a psychological impetus to sincerely hold to a false belief. As such, I can easily make sense of climate change denial in the face of overwhelming evidence: big money is on the line. However, the denial less rational for the majority of climate change deniers—after all, they are not owners of companies in the fossil fuel business. However, they could still be motivated by a financial stake—after all, addressing climate change could cost them more in terms of their energy bills. Of course, not addressing climate change could cost them much more.
In any case, I get climate denial in that I have a sensible narrative as to why people reject the science on the basis of interest. However, I have been rather more confused by people who deny the science regarding vaccines.
While vaccines are not entirely risk free, the scientific evidence is overwhelming that they are safe and very effective. Scientists have a good understanding of how they work and there is extensive empirical evidence of their positive impact—specifically the massive reduction in cases of diseases such as polio and measles. Oddly enough, there is significant number of Americans who willfully deny the science of vaccination. What is most unusual is that these people tend to be college educated. They are also predominantly political liberals, thus showing that science denial is bi-partisan. It is fascinating, but also horrifying, to see someone walk through the process of denial—as shown in a segment on the Daily Show. This process is rather complete: evidence is rejected, experts are dismissed and so on—it is as if the person’s mind switched into a Bizzaro version of critical thinking (“kritikal tincing” perhaps). This is in marked contrast with the process of rational disagreement in which the methodology of critical thinking is used in defense of an opposing viewpoint. Being a philosopher, I value rational disagreement and I am careful to give opposing views their due. However, the use of fallacious methods and outright rejection of rational methods of reasoning is not acceptable.
As noted above, climate change denial makes a degree of sense—behind the denial is a clear economic interest. However, vaccine science denial seems to lack that motive. While I could be wrong about this, there does not seem to be any economic interest that would benefit from this denial—except, perhaps, the doctors and hospitals that will be treating the outbreaks of preventable diseases. However, doctors and hospitals obviously encourage vaccination. As such, an alternative explanation is needed.
Recent research does provide some insight into the matter and this research is consistent with Locke’s view that people are influenced by both interests and passions. In this case, the motivating passion seems to be a person’s commitment to her concept of self. The idea is that when a person’s self-concept or self-identity is threatened by facts, the person will reject the facts in favor of her self-identity. In the case of the vaccine science deniers, the belief that vaccines are harmful has somehow become part of their self-identity. Or so goes the theory as to why these deniers reject the evidence.
To be effective, this rejection must be more than simply asserting the facts are wrong. After all, the person is aiming to deceive herself to maintain her self-identity. As such, the person must create an entire narrative which makes their rejection seem sensible and believable to them. A denier must, as Pascal said in regards to his famous wager, make himself believe his denial. In the case of matters of science, a person needs to reject not just the claims made by scientists but also the method by which the scientists support the claims. Roughly put, the narrative of denial must be a complete story that protects itself from criticism. This is, obviously enough, different from a person who denies a claim on the basis of evidence—since there is rational support for the denial, there is no need to create a justifying narrative.
This, I would say, is one of the major dangers of this sort of denial—not the denial of established facts, but the explicit rejection of the methodology that is used to assess facts. While people often excel at compartmentalization, this strategy runs the risk of corrupting the person’s thinking across the board.
As noted above, as a philosopher one of my main tasks is to train people to think critically and rationally. While I would like to believe that everyone can be taught to be an effective and rational thinker, I know that people are far more swayed by rhetoric and (ironically) fallacious reasoning then they are swayed by good logic. As such, there might be little hope that people can be “cured” of their rejection of science and reasoning. Aristotle took this view—while noting that some can be convinced by “arguments and fine ideals” most people cannot. He advocated the use of coercive habituation to get people to behave properly and this could (and has) been employed to correct incorrect beliefs. However, such a method is agnostic in regards to the truth—people can be coerced into accepting the false as well as the true.
Interestingly enough, a study by Brendan Nyhan shows that reason and persuasion both fail when employed in attempts to change false beliefs that are critical to a person’s self-identity. In the case of Nyhan’s study, there were various attempts to change the beliefs of vaccine science deniers using reason (facts and science) and also various methods of rhetoric/persuasions (appeals to emotions and anecdotes). Since reason and persuasion are the two main ways to convince people, this is certainly a problem.
The study and other research did indicate an avenue that might work. Assuming that it is the threat to a person’s self-concept that triggers the rejection mechanism, the solution is to approach a person in a way that does not trigger this response. To use an analogy, it is like trying to conduct a transplant without triggering the body’s immune system to reject the transplanted organ.
One obvious problem is that once a person has taken a false belief as part of his self-concept, it is rather difficult to get him to regard any attempt to change his mind as anything other than a threat. Addressing this might require changing the person’s self-concept or finding a specific strategy for addressing that belief that is somehow not seen as a threat. Once that is done, the second stage—that of actually addressing the false belief, can begin.