A piece of advice for people posting here and elsewhere: what you write will be more convincing and higher quality if you set out to survey the considerations on both sides of a disagreement.
This is because readers will be able to weigh the arguments on either side against one another in a single place. It also means you yourself will have to consider a wider range of angles in reaching your conclusion, rather than making a one-sided search for arguments in favour of whatever you believe at the start.
A example of the problem with the alternative is Peter Hurford's post on 'EA Falling into a Meta-Trap' which is one of the most up-voted posts ever written here. I don't mean to pick on Peter in particular because most people naturally write 'the case for conclusion X', including me. Fortunately, as Peter is one of the most popular EA writers I don't feel like a jerk using him as an example.
Conveniently I disagree with Peter's conclusion and believe that EA has been, and is likely to continue, to under-invest in meta-charity. I don't intend to convince you that I'm right about that here - instead simply imagine the voice in my head as I'm reading that post:
- Here are some arguments against spending too much on meta-charity.
- Hmmmm, I've already heard most of these considerations before, but think they face very strong considerations on the other side.
- Oh, the blog post ended without considering the overall weight of the arguments on either side.
- And it didn't try to measure what fraction of our resources go to meta-charity, what fraction might go to meta-charity in the future, and what would be an appropriate fraction all things considered. It's completely consistent with everything in this post that the primary risk is actually spending too little.
Unfortunately, this means I didn't update my views that much in either direction, despite it being a very important issue to me. Which is a shame, because everything Peter wrote was sound in and of itself.
Here's an alternative structure for a post:
- Currently many people believe something like X (including me).
- Here are the best arguments that people offer in favour of that belief.
- Here are the best arguments / counter-arguments I can think of pointing in the other direction.
- Overall I think points A, B and C should be given most weight, which means my overall judgement is now Y.
- It's more boring to read because you usually won't offer a strident view that people disagree with, and it takes longer to read.
- It's at least twice as much work.
- Commenters will offer the counter-considerations anyway.
I very much agree that one should neutrally survey both sides of an argument. However, one could argue that the fact that Peter Hurford's post is one of the most upvoted articles indicates that writing "one-sided" articles are in fact more persuasive, even though it shouldn't. I therefore think your title is slightly misleading. But generally I think this is a very good and important post.
One-sidedness is generally a sign of confirmation bias, the halo effect, or some other bias. This has got quite a lot of attention in EA circles. See, e.g. Yudkowsky's Policy-debates should not appear one-sided, and Gregory Lewis's Beware Suspicious and Surprising Convergence. I myself have made a political bias test based on this idea and written an academic paper explicating its logic in Bayesian terms. I have also argued that one-sided multiple-factor explanations are suspicious (see also Scott Alexander' post on this issue ).
In the multiple factor post, I argue that illuminaries like Jared Diamond and Steven Pinker are guilty of arguing in this one-sided way, which is very pervasive indeed. Possible arguments in favour of writing in this "one-sided" way (a question that Rob discusses above) are discussed in the comments section (see the comments by DavidAgain and my responses).
It's probably persuasive to people with no existing view or knowledge, but not to people who disagree or know a lot already.