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. Those not born to a Jewish mother may become accepted as Jews by the Orthodox and Conservative communities through a formal process of conversion to Judaism in order to become "righteous converts" (—). In addition, Halakha requires that the new convert commit himself to the observance of its tenets; this is called (), "Acceptance of the Yoke of the Commandments". () is used by Reform Judaism in accordance with reform responsa and Halakhah. Both Haredi Judaism and Modern Orthodox Judaism accept a similar set of rules regarding Jewish status based on classical rabbinic Judaism, including both matrilineal descent and requirements that conversions be performed by Orthodox rabbis and that converts promise to strictly observe elements of traditional Judaism such as Shabbat and Niddah. However, their application of these rules have been different, and the difference has been increasing in recent years. Modern Orthodox authorities have been more inclined to rule in favor of Jewish status and to accept non-Orthodox Jews' word in doubtful cases involving people claiming to be Jews, while Haredi authorities have in recent years tended to presume non-Jewish status and require more stringent rules and standards of evidence in order for Jewish status to be proven, and have tended to distrust the evidence of Jews who are not personally Orthodox. Haredi rabbis have tended to look at a convert's current personal observance and to regard deficiencies or lack of Orthodoxy in current observance as evidence that the convert never intended to validly convert. In addition, the contemporary situation is further complicated by the fact that some Haredi rabbis no longer regard some Modern Orthodox rabbis as reliable. Karaite Judaism