why would anyone feel compelled to write an article on this? it's pretty commonly known that after the advent of modern technology and the decline of typewriter use (out of which the 2-space usage gained prominence, for what practicality reason i do not remember), modern usage has changed from 2 spaces to 1. in other words, unless you are a luddite and/or still using a typewriter, then 1 space is the norm. that is all you need to know really.