Muslims' Epistemology

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The other we were discussing in our Sociology of Religion class a term called epistemology.. I confess every time I look up its meaning in the dictionary, which I have been doing for some years now, I get more confused than ever, especially because of its fairly repetitive mention in books and philosophical articles. Now I have no confusion about it, since when i came to know:

"The sunna is our epistemology."

-Abdul hakim Murad.
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