Unrelated: I am mystified by your competent use of the term "orthogonal" coming just two words after you used "you're" instead of "your." That is just bizarre!
It's not a grammar mistake, I have trouble when I type quickly. Another error that I make: I often type a word that sounds similar in place of what I actually meant. Case in point: http://news.ycombinator.com/item?id=2067123.
