Guest Column by Sarah B.

[From your Host: This excellent essay arrived on an Open Forum, and as I sometimes do, has been elevated from Comment of the Day status to a Guest Column. I’ll even forgive Sarah for making me look bad in comparison to such thoughtful, eloquent and perceptive work.]

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“The embarrassment is that chemistry was treated as a mere technicality rather than the foundation of the entire conclusion. The embarrassment is that skepticism—real skepticism, the disciplined refusal to accept claims without robust evidence—was framed as denial rather than diligence.”

This is, in my opinion, the money quote from The Brain, Microplastics, and the Collapse of Scientific Restraint. 

This particular article discusses the extraordinary claim that our brains contain a huge amount of microplastics.  The problem with this claim is that the study has a fatal methodological flaw.  The study relies on spectroscopy and detecting signatures of chemicals to determine a sample’s composition.  However, the fats in the brain break down into similar compounds as polyethylene, which means without further differentiation methods, there is no way to tell if the “microplastics” the study detected were actually just normal lipids found in the brain.  The whole article is worth reading, as it does an excellent job of explaining the issue. 

I recently saw a post on Facebook that decried the idea that experts could be challenged by some novice watching a few YouTube Videos and reading a few scientific papers.  This led to a long discussion in the comments, which was unfortunately extremely one-sided.  Most everyone agreed that trying to correct an expert in their field was utter hubris.

“Take something you are good at, like maybe changing transmissions.  Imagine someone who has watched a few YouTube videos comes up and tells you that you are doing it all wrong.  How would you respond?”

The main problem with this is that, in terms of changing a transmission, we can obviously see who is right and who is wrong.  The car will run, or the car will not.  Indeed, if you truly are an expert in changing transmissions, you can step up and, in simple terms, explain why your process is the correct one, what is wrong with the YouTube watcher’s process, and even perhaps teach your skeptic how to do it correctly. 

With any field of expertise, we have to remember that experts are people too, and all humans have flaws.  Experts can be tempted by money, power, prestige, and politics.  There are also limitations that even experts struggle to overcome.  For example, in many branches of research, there are serious problems (often ethical in nature) in creating a good control group.