During my sophomore year at Middlebury College, I took notoriously tricky course called Introduction to Modern Logic. An early requirement for philosophy majors (one of the many declarative detours I flirted with before landing on the equally useless History degree), it focused on good reasoning and the technical breakdown of arguments.
A basic example:
If Bellaroo is napping on her dog bed, then Bellaroo is not taking a walk.
Bellaroo is napping on her dog bed.
Therefore, Bellaroo is not taking a walk.
The statement is true in all circumstances, regardless of time, interpretation, or the laws of physics. If Bellaroo is napping on her bed, she is irrefutably not taking a walk.
The point of this course is to help students identify patterns of good reasoning and patterns of bad reasoning, so they have a better idea of what to follow and what to avoid. The tricky part occurs when a statement seems true at first glance, but breaks down when logic is applied. These are called logical fallacies, and they are everywhere.
A few examples:
The Appeal to Ignorance, where we assert a claim because no one can prove otherwise.
People have been praying to God for years. No one can prove He doesn’t exist. Therefore, He exists.
The Bandwagon, where we assume something to be true or good just because many others believe it to be true or good.
Everyone at the gym is wearing Lululemon. I need to buy their yoga pants.
The Red Herring, were we use irrelevant information to distract from an argument.
There are starving children in Africa. Eat your broccoli.
Psychiatry, more than any other branch of medicine, is saturated with logical fallacies. Hell, we can apply all three of the above examples to cultural rationale within the world of psychiatry and mental health:
- I have been taking antidepressants for years. No one can prove they don’t fix my chemical imbalance. Therefore, they fix my chemical imbalance.
- Everyone I know is taking antidepressants. I need to be taking antidepressants.
- There are people without access to psychiatric care. I must listen to my psychiatrist.
The most pervasive logical fallacy in psychiatry and mental health diagnoses, though, is circular reasoning, which is an argument that uses the same statement as both the premise and the conclusion.
The reason why circular reasoning is so pervasive in psychiatry compared to other specialties is because psychiatry doesn’t have any form of objective boundaries. The rest of medicine, generally, agrees on parameters that define a pathological disease. Diabetes in the United States is only diagnosed as diabetes when two fasting A1C blood sugar tests read 6.5% or higher. Doctors—and even different countries—debate 6.5% as the cutoff, but all agree that at a certain point, high blood sugar levels indicate disease.
But psychiatric criteria cannot explain behaviors or experiences through any means beyond subjective opinion. Furthermore, as we’ve been exploring throughout the last few issues, these subjective opinions are rooted in norms and meaning. They can’t be measured independently, and they are not necessarily true across time and culture.
And yet, the flywheel of circular reasoning continues to spin, flinging the world of mental and emotional health further away from the solution. As British child psychiatrist Sammy Tammi said in his open letter on the diagnostic model of psychiatry to the Society of Humanistic Psychology, “The result of this basic [logic] error is that medical scientific knowledge in the area of mental health is at a standstill. No chemical imbalances, consistent neurological differences, genetic abnormalities or markers found. None. Billions of dollars of wasted money on wasted biological research that leads nowhere…higher levels of reported stress and anxiety, higher numbers of people disabled due to a mental health condition and rates of significant improvement from those attending mainstream services hovering at around a quarter to a third of those they see. These are not the outcomes you would expect to see from an effective model of clinical care.”
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