Why Some Weird Beliefs Aren’t

People hold a lot of weird beliefs, but these weird things seem a whole lot less weird once you understand the reasoning behind them. In this post, I’m going to sketch out the gist of a couple “weird” beliefs.

The hope is that once you understand why people believe weird things, you’ll stop thinking of them as crazy and realize that they, too, are human beings just like you and me. I don’t necessarily endorse the beliefs here, but they are things that used to baffle me, but I now feel like, “I get where you’re coming from.”


Vegans consume only non-animal products. Some vegans will still eat some products, such as honey, while others might abstain from animal products entirely, going so far as boycotting leather and even leather lookalikes.

People go vegan for different reasons. These are not mutually exclusive.

An argument from animal suffering

Factory farming is institutionalized cruelty on a scale that is hard to comprehend.1 Vegans who go vegan for reasons of animal suffering usually do so based on the belief that buying factory farmed meat is wrong. Specifically, they value not participating in animal torture more than the inconvenience of not eating animal products.

A lot of people will retort with, “Who cares? They’re animals,” which strikes me as a rationalization. If I came to your house and started kicking your dog, you would not like that, even though your dog is “just” an animal.

So, then, one might say: yes, but I love my dog, and I don’t love the cow I’m eating, which is fair enough. If I invited you to my house and said, “Give me a nickel or I’m going to torture this cow”, you would probably give me the nickel (or call the police), which suggests that you, yes, you value animal suffering.

At this point, you might argue, well, yes, I’ll pay not to see an animal tortured, but as long as I’m not aware of it, who cares? You could reason this way, but it strikes me as not all that plausible. Why should torturing a cow only be wrong when you witness it?

An argument from human suffering

Let us say that you do not value animal suffering, or that you do not value it enough such that you’re willing to change your eating habits. There are other reasons why one might choose to be vegan.

Veganism is more sustainable than factory farming.2 Meat is not an efficient source of energy. Only about a fourth of the energy from the grain that we feed cows makes it into the meat itself.3 We could maintain a higher population of happy, non-starving humans if the world was populated by vegans. That is: you might go vegan because you value other human beings not suffering, not because you care about animal welfare.

Further, livestock have a huge impact on the environment. Cattle farming is responsible for dumping more carbon dioxide into the environment than transportation.4 Given that we value all the global warming doomsday scenarios not occurring, veganism should be appealing.

An argument from personal health

Finally, one might become a vegan because they value their own personal health more than they value eating animal products.

Some people argue that veganism is not that healthy for you, that vegans are missing some of the vitamins that are mostly obtained through animal products. This is missing the point. The question should be: is the average vegan diet healthier than the average non-vegan diet? The answer to which is almost certainly yes.5,6 Comparing the ideal non-vegan diet to the average vegan diet is not a relevant or fair comparison.

The best individual comparison might be: will a vegan diet be healthier for me than my current diet? If so, given that you value your own health, you should be willing to consider veganism. It is, of course, possible that the costs of switching to a vegan diet outweigh how much you value the health benefits, which would imply that you should not switch.

The status quo

Another interesting question that can be posed regarding veganism is, “If you were born into a vegan society and grew up eating a vegan diet, do you really think your would choose to eat animal products?” Or even, “How much would you have to pay vegans to convince them to go back to eating meat?”


People who sign up for cryonics do not believe in an afterlife. If you are going to live eternally in heaven, there is no reason to freeze yourself in the hope of being resurrected in the future. (Although, if you suspect you are going to suffer eternal damnation hell, resurrection starts to look mighty appealing.)

Those who sign up for cryonics don’t necessarily believe that cryonics works or will work, but they do believe that there is a higher probability that they will be brought back to life by signing up for cryonics than if they don’t sign up for cryonics.

Essentially, the choice boils down to a decision between:

Thus, signing up for cryonics seems reasonable given that:

Existential risk

People who would never dream of hurting a child hear of an existential risk, and say, “Well, maybe the human species doesn’t really deserve to survive.”

Eliezer Yudkowsky

With the rise of nuclear warfare, the human race now has the ability to cause destruction on a scale that was not possible in the past, including self-destruction. Unchecked global warming could destroy our biosphere or an especially virulent bioweapon could kill everyone.

If we extrapolate from the past trend of technology toward more and more control over the environment, the future seems to hold even more dangerous technological advances (e.g. nanotechnology and grey goo). Nick Bostrom offers the analogy of the scientific process as pulling random technologies from an urn of possible technologies.7 You never know when you will stumble on something terrible.

The study of existential risks is the study of events that could cause human extinction. Those in the field estimate that there is a significant chance that humanity will not survive this century. One survey of experts placed the probability at 19%.8

So, given that you value your own life and those that you love, you should value reducing the threat of human extinction.

Future generations

Wiping out the human race not only kills all of those who are living now, but it would also mean that future humans will never be born. In essence, human extinction means that they never get the chance to live.

Most of the people interested in existential risk believe that future humans have some moral significance. Even if we assume that only one billion humans can live on the earth sustainably, and that the earth will remain habitable another billion years, then \( 10^{16} \) future lives would be lost if the human race destroys itself.7

If you multiply a small reduction in existential risk by the number of future human lives (an expected value calculation), you get staggering numbers. Reducing the risk of extinction by a tenth of a percent is worth as much as \( \frac{1}{1000} * 10^{16} \), or ten trillion future lives.

Work on existential risk seems reasonable, then, given that:

We’re living in a computer simulation

The simulation argument argues that at least one of the following is true:

There are also a few assumptions:

If civilizations similar to ours inevitably go extinct, then there is no reason to believe that we are being computer simulated. After all, who would be simulating us?

If civilizations similar to our own don’t go extinct and do invariably reach greater levels of technological attainment, such that they can simulate worlds like this one, they either choose not to simulate people (perhaps believing it immoral) or we are living in a simulation.

Why is this so? An advanced civilization would be able to simulate many possible worlds given the amount of computational power that they would control. The number of simulated worlds, then, is some large number \( N \) and then number of real, non-simulated realities is one. The probability that we just happen to be the non-simulated civilization is \( \frac{1}{N + 1} \). The more simulations a civilization would choose to run, the more likely it is that we are, right now, in a simulation.

If advanced civilizations do not run such simulations or do not have the capability to run the simulations, then the probability that we are currently being simulated is near zero.

So, the reasoning for people who believe that we are currently living in a computer simulation is something like this:


Singularitarianism is the idea that the future is going to look drastically different than the present, and that it’s going to happen very quickly. At the core of singularitarianism is the idea that change, technological progress, is accelerating. Things are improving more and more rapidly.

One common example is strong artificial intelligence. That is: machines that are smarter than humans. If a human can build a machine that is smarter than a human, then this machine should be able to build a machine even smarter than itself, and so on, culminating in something different than whatever we can imagine.

Most of singularity type ideas revolve around the idea of smarter than human intelligence, but this isn’t essential. You might believe that more technological progress enables even more progress and that this keeps compounding on itself, such that technology improves at faster and faster rates.

So, for example, a singularitarian might think of all the progress that has been made in the past 100 years, and posit that a similar amount of progress will be made in the next ten years. This would become more and more compressed, such that the next ten years after that might encompass something like a thousand years of progress or more. Envisioning such changes becomes impossible. What does another thousand years of progress look like?

The reasoning, then, is something like:


Most educated people are, these days, pro gay marriage, but if you suggest that people ought to be allowed to marry more than one person, this is crossing a line. Most of the reasoning for allowing gay couples to marry, however, also applies to marrying multiple partners.

Of course, you can be polyamorous without marrying multiple people, e.g. an “open relationship.”

Most of the arguments against open dating (ignoring religious concerns) center around the issue of jealousy. According to at least some people in open relationships, jealousy is less of an issue then you might at first think, with a couple people reporting here that it is a non-issue.

Or, if jealousy is an issue, those in polyamory communities or who engage in open relationships figure that it is something that can be overcome. I suspect that there is a significant selection effect going on here, though, such that people who experience strong feelings of jealousy tend to never become polyamorous or, once they try it, decide that it is not for them.

All of this avoids the question, though, why be in an open relationship? Even if jealousy is a non-issue, it must have significant benefits over traditional relationships for it to be worthwhile.

Some reasons are:

Further Reading


  1. Given the conditions of factory farms (Wikipedia has the most neutral article I could find), it is hard to imagine how this could be otherwise.

  1. Pimentel, David, and Marcia Pimentel. “Sustainability of meat-based and plant-based diets and the environment.” The American Journal of Clinical Nutrition 78.3 (2003): 660S-663S.

  1. Singer, Peter. Practical ethics. Cambridge University Press, 1993.

  1. Steinfeld, Henning, et al. Livestock’s long shadow. Rome: FAO, 2006.

  1. Appleby, Paul N., et al. “The Oxford vegetarian study: an overview.” The American journal of clinical nutrition 70.3 (1999): 525s-531s.

  1. Key, Timothy J., et al. “Mortality in vegetarians and nonvegetarians: detailed findings from a collaborative analysis of 5 prospective studies.” The American journal of clinical nutrition 70.3 (1999): 516s-524s.

  1. Bostrom, Nick. “Existential Risk Prevention as Global Priority.” Global Policy 4.1 (2013): 15-31.

  1. Sandberg, Anders, and Nick Bostrom. “Global catastrophic risks survey.” civil wars 98.30 (2008): 4.

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