Learning about informal logical fallacies turns young philosophy students into gun-slinging logic vigilantes. I love how this comic (courtesy of Existential Comics) portrays the phenomenon.
But, as Alexander Pope wrote, “a little learning is a dangerous thing.” In his Essay on Criticism, Pope critiques the critics, warning them of trying to evaluate beyond their skill. The essay (written in verse) holds great wisdom, well-worth the hour it might take to read through. One takeaway is this: if you plan to engage in criticism of a view, be sure you know what you’re talking about. Otherwise your photo may end up on Wikipedia’s Dunning-Kruger Effect page. “Drink deep, or taste not the Peirian spring.”
The Appeal To Authority
One of the fallacies mentioned above that gets frequent abuse is the “appeal to authority.” Those who have only sipped at the Peirian Spring misunderstand this concept, and so make two common errors: 1) they accuse others of it falsely, and 2) they become oblivious to their own appeals to authority. Let me illustrate a little.
Fallacious appeal to authority: Brett claims that beer causes Alzheimer’s Disease. Conrad replies, “That’s silly.” Brett says, “My friend, Dr. Swanson, said it. Therefore, it’s true.”
Legitimate appeal to authority: Mark claims that black holes emit radiation. Kenny says, “But nothing can escape from a black hole.” Mark retorts, “Stephen Hawking has argued powerfully for this and talks about it in his book, A Brief History of Time.”
What’s the difference? For one, Stephan Hawking clearly satisfies any reasonable criteria for being a legitimate expert on black holes. It is not at all clear that Dr. Swanson is an expert on Alzheimer’s. Conrad may not even know who Dr. Swanson is. Second, Brett bases his argument solely on the word (hearsay) of Dr. Swanson, while Mark offers at least one checkable resource. Third, Brett fashions his argument in deductive form. But an argument from authority should take inductive form, i.e., the evidence from authority does not guarantee the conclusion–it only makes it more likely to be true. A fourth mistake sometimes made in appeals to authority, though not in this case, is when someone misquotes or misrepresents an expert.
We All Do It
The bottom line is: we all rely on legitimate appeals to authority, and rightly so. Testimony (information transmitted to us from other persons, as in court) acts as one of at least five sources of knowledge (inference, memory, perception, and consciousness being the others). I simply cannot help but rely on the words of other people to help me form my beliefs about the world, like when my daughter tells me she is at a friend’s house. And I especially rely on those who have expertise in various areas: scientists, philosophers, doctors, lawyers, musicians, etc.
But I still need to treat authority carefully. When I decide whether to believe something I read or hear, I should make sure I know the source. Not all sources — people, publications, websites–are created equal. I would check to see whether the writer/speaker is an expert or is quoting an expert. And I still use reason and background knowledge to filter the expert’s claims. I address some of these ideas in this 2 minute clip from a talk at the University of Missouri Skeptics Club:
(You can see this video, “Responsible Believing,” in it’s entirety here.)
A Final Paraklesis
(I like the Greek word ‘paraklesis’ because it can mean both “encouragement” and “exhortation.”) Sometimes extra caution is required. I may take risks, at times, with my own health–like when I indulge in pipe-smoking. But I should think twice about the health risks when recommending such things to others. Similarly, I am sometimes negligent with my epistemic health–like believing something without sufficient consideration. But I try to exercise extra caution and care when conveying ideas (teaching, writing, speaking, using social media), based on authority, to others. Take an extra moment to ask, before you post or assert something based on authority,
- Is the authority legitimate? (not always an easy question)
- If the issue is controversial, have I portrayed it as one-sided by only quoting one expert?
- Is the authority an expert in the relevant field?
- Did I accept this expert’s word uncritically, or have I checked it out?
- Have I represented the authority accurately?
And before you draw your fallacy six-gun and dispense epistemic justice on someone, ask whether they might be making an appropriate appeal to authority.