A rebuttal of Phil Craven's "Google Explained"

Thread Title:
A rebuttal of Phil Craven's "Google Explained"
Thread Description:

Comments are directed only at his PageRank explanation.

>>>His analysis is flawed, as are all the others he refers to, and many more that I have read. The chief problem with all these analytical papers is that they assume or arbitrate a closed system to preserve a PR average of 1.0. Google isn't doing that. The Web is an open system, not a closed system. Hence, any closed-system model will diverge from Google's practical application.

A very good read!


The problem here is perhaps t

The problem here is perhaps that he's making a modern analysis of an already very old analysis of an even older algorithm.

Phil's paper has been up a few years already - Google behaved very different as a search engine when it was written - those were the days of monthly dances etc.

Whether it was every conceptually flawed or not, it was one of the major analyses on Google PageRank when Google PageRank was a very real concern, and I believe it gave good indicator of how Google actually behaved on a practical level.

To try and take that original analysis out of its rightful context and apply it to a different contemporary environment just seems pointless.

Much as I respect Michael Martinez's online work in science fiction and fantasy, I find his analysis of Phil's original analysis to be little more than irrelevant. Sorry. :)

Ammon Johns investigates

and reviews Michael's points here:


"Brin and Page did not suggest that the damping factor need not be applied to all pages, as Mr Martinez erroneously asserts. Instead, they suggested that a numeric damping factor need not be used at all, and that one could use a page (kinda like using a comparison filter) as the damping factor, which would allow for personalization, perhaps even localization or topical-filtering.

I never heard that some people figured Yahoo had no damping factor, but if they did, I'd have ignored them as not understanding the theory or the papers properly."

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