TheMadScientist - 10:48 pm on Jan 13, 2013 (gmt 0)
You look at the resultset behavior of your visitors for those you have external behavior data on and then you write rules to refine your results based on the findings so it applies to the entire index and all visitors ... When your system does it automatically it's called 'machine learning' ... Go figure.
These have already been linked, but I think they're worth a repeat:
Ray Kurzweil Joins Google In Full-Time Engineering Director Role; Will Focus On Machine Learning, Language Processing [techcrunch.com]
Large scale machine learning systems and methods [patft.uspto.gov]
It doesn't matter if any of us think they can or if we think it's possible or not, they're going to do it and already figured out how, likely quite a while before they announced their wanting to become a 'knowledge engine'.
NP Claaarky ... It helped me 'draw a conclusion' in this one ... [I'm still a bit 'shocked' it's so simple to see now (for me anyway) what they're doing and where they're going] ... BTW, thanks for the questions and 'forcing me to figure out how to say what I've been thinking', I appreciate it :)