Author here. The thing that strikes me here is how something like Reddit Math can fall for the same kinds of &#x27;wisdom of the crowd&#x27; things we&#x27;d typically see on Facebook.<p>Some people like the analogy, so the the math isn&#x27;t questioned. The post hits reddit&#x27;s Best Of and more people vote it up. Now it&#x27;s three months since the post and you&#x27;ll only notice the error if you collapse the first comment, which is full of praise for the analogy. This is despite Reddit math being a self-selected crowd with a specific interest in the topic.<p>Note: I originally said &#x27;nobody noticed the error&#x27; but as @tzs points out, some users did - collapse the first reply thread and you&#x27;ll see them.