The canonical reply to this article, by Steve Losh: http://stevelosh.com/blog/2012/10/why-i-two-space/ http://stevelosh.com/blog/2012/10/why-i-two-space/ Amon

The canonical reply to this article, by Steve Losh: http://stevelosh.com/blog/2012/10/why-i-two-space/ http://stevelosh.com/blog/2012/10/why-i-two-space/ Among other things, he points out that computers have a much easier time parsing sentences which are clearly separated by two spaces, and that some features in e.g. vim don't work well with single-spaced sentences.