I think your intuitions are generally correct, and as I say, it's usually a good heuristic to avoid overly processed food. In the absence of other evidence, if you're in a food market where everything is edible, you should probably opt for the less processed option. I also don't disagree with it playing a role in national health guidelines.

But it's a very imprecise heuristic, and I think LessWrong-ers with aspirations to understand the world more accurately should feel a bit uncomfortable with it, especially when benign and beneficial processes are lumped together with those with much clearer mechanisms for harm. 

Thanks for this piece. I admit I have always had a bit of residual aversion to seed oils that I've struggled to shake.

Having said that, as you're pushing so strongly against seed oils in favour of "processing" as a mechanism for poor health, I think I need to push back a bit.

If you want to be healthier, we know ways you can change your diet that will help: Increase your overall diet “quality”. Eat lots of fruits and vegetables. Avoid processed food. Especially avoid processed meats. 

"Avoid processed food" works very well as a heuristic - far better than anything like the "nutrition pyramid", avoiding saturated fats/sugars or calorie counting etc. But it also seems like something that should annoy people who like clear thinking and taxonomies. 

As you note, "processing" includes hundreds of processes, most of which have no plausible mechanism by which they might harm human health. Articles describing the ultra-processed taxonomy often just list a litany of bad-sounding things without an explanation why they're bad e.g. "mechanically separated meat", "chemical modifications" and "industrial techniques". Most of these are either benign when you think about it (we'd all prefer a strong man wearing a vest separating our meat with his bare hands, but come now...), or so vague as to be uninformative.   

If ultra-processed foods are bad because they contain "hydrogenated oil, modified starch, protein isolate, and high-fructose corn syrup" or "various cosmetic additives for flavour enhancement and colour", then it's these products that are bad, not some mysterious processing! 

If it is some technical part of the processing, like "hydrolysis, hydrogenation, extrusion, moulding, or pre-frying" that's bad, surely we should just identify that rather than lumping everything together? 

If it's some emergent outcome of all these processes, like "hyper-palatability" or "energy density", then that's the problem, not the fact of being "processed". If so we should all stop eating strawberries after they hit a certain deliciousness threshold, and avoid literally any edible oil (because all oil is identically energy-dense). 

But, having said that, I still use this heuristic, and I'm pretty glad I trained myself out of preferring highly-processed food when I was less analytical. 

Ah, thanks, okay, I get it now. That's a very different proposition! Updated my post.

MoviePass users are selected for seeing a lot of movies. If MoviePass makes a business plan that models users as average people, it will lose a lot of money. Conditional on someone wanting to buy MoviePass, MoviePass probably should not want them as a customer.

I'm going to nitpick here and note that the marginal cost to the cinema of allowing in an extra customer is often close to zero, seeing as most films don't sell out. It may even be positive, if they spend money on popcorn and drinks, and invite their friends who don't have a pass. 

It seems from that article that the failure in the business model was partly that MoviePass was just badly managed, partly that people were abusing the system in various ways by scalping/ selling tickets/ getting hundreds of people using the same service.  

I checked my local cinema chain and they started running an 'Unlimited' service over a decade ago, and it's still in use, so I think it remains a valid model. 

Correction: I understand the MoviePass model now and the adverse selection argument makes more sense. Cinemas with a subscription model can work even with a high proportion of power users, but that's because the externalities (popcorn, drinks, inviting friends) accrue to the cinema. 

I presume the stated goal of schooling your child in this way is to set the grown-up's mind at ease, rather than ensuring the child is left alone (which is probably the default outcome), and I expect both responses would suffice for this instrumental purpose.

Technically true, but it's a very unagentic way for a five-year old to respond to something they should have the capability to justify through argument. 

Some good thoughts here.

My thinking is that participation in online communities is mostly incentivised through status and inclusion. Upvotes or informal status mechanisms enable someone to be perceived as a valued member of an online community that they identify with. But power and status are subtly different - moderators have the power to ban, admonish, censor, and sometimes signal-boost, but they don't necessarily gain respect or status based on this - in fact, it's often the opposite. 

Creators acquire status based on the quality of their output (through formal (Karma) and informal (general reputation) mechanisms), but the power that this affords is usually quite indirect (extra upvoting power on LW and EA forums). This can potentially transform into real-world power over the moderators in the case of a coup or a protest, but I'd say that this attracts a different kind of person to moderation.

I'm not sure how useful the "duty vs. privilege" framing is, but the idea that some of these activities may be over- or under-incentivised is an important question. I'd have thought that moderation would be under-incentivised, which is why I've always been a bit fascinated by voluntary moderation. 4chan-type forums are the most bizarre example; it has always perplexed me that someone is taking this "responsible" social role to make sure that /pol stays "on-topic" despite the sub-forum being an anarchic cesspit, and probably getting influxes of hate from censored/ banned participants while doing so. But the existence of moderation suggests that there must be a type of person who genuinely enjoys the power that it affords.

Writing high-quality original posts is probably appropriately incentivized - there are enough people who like writing and it provides internal and external validation. Like with meta-analysis and replicating in academia, there are probably some curation tasks that are under-incentivized in most online spaces, but LW/ EA seem pretty good at that.

Forgive the unverified sources here, but total potato consumption seems to correlate quite strongly with obesity across Europe, so if there's any causal effect behind the potato, it would have to explain why countries that eat potatoes as staples seem to have slightly higher obesity rates than other countries.