This algorithm seems incredibly arbitrary and fails to account for the complexity of diction or sophistication of content of the post. (Obviously, this is incredibly difficult and computationally-intensive, and is likely untenable for a simple Chrome app, but applying such a narrow and draconian algorithm that reduces such complex facets of pedagogy and language into a calculus comprised only of sentence size and syl…
Indeed, brevity is the soul of wit.
...alright, even my tongue-in-cheek comment only hit the the 7th grade. Methinks the true goal of "a Chrome extension which hides all HackerNews comments that are below an 8th grade reading level" is to get everyone off the comments and back to work.