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Brian Smith's avatar

Thanks for a concise and insightful column. Reading the introductory paragraph, I had trouble deciding whether to be puzzled, amused, or outraged by Leiter's premise - that the problem with the internet era is that we no longer have authorities who are widely believed. To pick the topics he mentions, which supposedly have no controversy among experts:

Climate change: What, exactly, is the agreement among experts? I think that experts believe that the climate is changing (primarily warming), and that human activity is a major cause, if not the only significant cause. But if we can believe the meta-epistemic authorities in the media, the epistemic authorities also believe that we must immediately and drastically curtail all emissions of greenhouse gases, in order to prevent global catastrophe that threatens civilization itself. But the actual scientific publications of the actual experts recognized by the IPCC (supposedly the epistemic authority on the subject) don't support these beliefs.

Effects of vaccines: What, exactly, do the experts agree on? I assume that experts agree that many vaccines (polio, smallpox, rubella, pertussis, tetanus for example) are safe (meaning minimal risk of side effects) and effective (preventing recipients from getting the disease), and that high levels of immunization in the population produce "herd immunity" that essentially eradicates these diseases in the population. How much of this applies to other vaccines, like COVID? When the experts tell us that COVID vaccines are "98% effective," does that mean that 98% of recipients will not get COVID, or that 98% of recipients will get some benefit, or something else? Our meta-epistemic authorities in the media told us the former, but they were apparently wrong. Why were they wrong? Did they apply the smallpox model inappropriately because they didn't understand? Did the epistemic authorities try to correct them, or were the epistemic authorities also wrong?

The role of natural selection in the evolution of species: This topic seems different, at least for the Western world, because disagreement with the experts seems primarily driven by religious belief. But in that sense, there has always been a significant part of the population that didn't accept the experts, and the internet hardly caused that disagreement.

The biological facts about race: I'm not sure what the "experts" agree on here. I expect generalizations like "differences within racial groups are larger than any possible differences between groups," but so what? There was a time when "scientific racism" was adopted by the epistemic authorities, but has now been discredited, replaced by an axiomatic belief that there are no differences. How much of this agreement among experts is based on quantifiable evidence, and how much on politically imposed orthodoxy enforced by social and professional ostracism? It is generally accepted that all humans share approximately 99.9% of DNA, but we also share 98.8% of our DNA with chimpanzees, and 40-50% with cabbages. Do these numbers mean anything?

It may well be true that there was less disagreement and controversy in the halcyon years between World War II and the internet, but that doesn't mean there were more true beliefs and less ignorance.

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Scott Gibb's avatar

Arnold - Thank you for defining the philosophical jargon in this piece. Much appreciated for those of us with engineering and economics backgrounds. I’m going to make my sermon short today. The problem that you’re now trying to solve is an engineering problem. I suggest that we use systems engineering processes to speed up development of solutions. This probably means meeting in person, using the white board, and doing presentations. It means being methodical, rigorous and in accordance with disciplined systems engineering protocols.

Let’s start by define the problem, list our assumptions and clearly state our goals. What are the knowns? What are the unknowns? What experiments do we need to perform? What test beds need to be developed?

You’re on the right track.

I want to also emphasize this very basic point from a previous comment.

Probably the biggest improvement that Substack offers is the direct payment from student to teacher, from reader to writer, from learner to educator. It is the closest model to Adam Smith’s vision for students paying professors directly. This promotes good teaching. This is one of the most important facts we have when it comes to understanding what’s wrong with higher education. Government and other third-party funding has messed it all up.

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