Answering the question is like answering how some mathematical proof works that goes for 200 pages. GS is a complex system that builds on itself.
Do you feel confident you personally have the answer in your own mind, or are you just running on the assumption that GS must contain it somewhere, because of its general wonderfulness?
The outside view: http://lesswrong.com/lw/54u/bayesian_epistemology_vs_popper/3v49
If it's worth saying, but not worth its own post, then it goes here.
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