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How does the automatic subjective filter work?

I'm very curious about how people think Stack Overflow is determining whether or not a question is subjective and highlighting it once you've entered the title. I'd like to build a similar capability but wouldn't know where to start. The AJAX callbacks, HTML and stuff is easy ... but analysis the question itself seems to be quite complicated.

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migrated from stackoverflow.com Oct 2 '09 at 20:14

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marked as duplicate by Hilarious Comedy Pesto, Shog9, Joel Coehoorn Oct 2 '09 at 20:25

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
@Jherico - beat me to adding the subjective tag :) –  Russ Cam Oct 2 '09 at 20:14
    
How is that possibily not programming related? I'm looking for a code sample to do this. Is it regex? Is it a natural language processor. The magic of StackOverflow is waning. –  Nissan Fan Oct 2 '09 at 20:16
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@unknown: if we hadn't migrated it, it'd be more difficult to point out the many questions that already address this (such as the one Pesto linked to). SO-specific questions belong on Meta; if you didn't intend this to be specific to SO, then you shouldn't have phrased your question the way you did... –  Shog9 Oct 2 '09 at 20:20
    
look for words like "best" –  dotjoe Oct 2 '09 at 20:24
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1 Answer

Compare the words in the title to words in titles of questions that have been closed as subjective. If, say, 30% (adjust as necessary) of the words match you might have a winner.

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