As a result, mere "belief" in the principles of Judaism does "not" make one a Jew. Similarly, non-adherence by a Jew to the 613 Mitzvot, or even formal conversion to another religion, does not make one lose one's Jewish status. Thus, the immediate descendants of all female Jews (even apostates) are still considered to be Jews, as are those of all their female descendants. Even those descendants who are not aware they are Jews or practice a religion other than Judaism, are defined by this perspective as Jews, as long as they come from an unbroken female line of descent. As a corollary, the children of a Jewish father and a non-Jewish mother are not considered to be Jews by Halakha unless they formally convert according to Halakha, even if raised fully observant in the Mitzvot.