What is Karaism?

My view of Karaism is the religion of Israel, i.e. the 12 tribes of Yisrael, who lived in the Land of Israel and descended from Avraham, Isaac and Jacob.  The Torah was written by Moses, who was a Prophet. The rest of the TeNaKh was written by later prophets and scribes.    What Orthodox and Conservative as well as reform rabbis and Jews alike base their religion on - the "oral law" is not always logically consistent with the Written law. And this is the basis of the debate.