What I am saying is that the Lemba and the Ashkenazim cannot both be 100% pure Jews. What is your answer to that? Are you saying that the Lemba are not really Jews because their maternal line is not Jewish? What is your answer to this question that I raise?
Assumimg you're a male, you can have a child who is "100% pure Jewish": if you define Jewish as being fully accepted as a Jew in a minyan (prayer service) or for any other reason by other Jews.
The issue here, again, is not who is Jewish. The issue is whether I, or other Jews,are direct descendants of the Jews you read about in the Bible.