Reply To: Tzedukim and Karaim

I believe I heard we do not suspect them (in general) of being nonjewish because they married among each others since many generations. Even if someone had been improperly converted or had a nonjewish mother, we assume those people eventually left the fold. Those who remain are mixed into the community and they all have a presumption of being jewish. Of course this does not apply to a Karaite with a known nonjewish mother or maternal grandmother.