In modern times, we go out of our way to make sure that we never find out that someone is a mamzer. For example, courts in Israel are very reluctant to order paternity tests for children for fear of ...
One who commits incest is punished with Kares (spiritual separation from the divine source), and any product of incest has the status of a Mamzer. One who has relations with a Niddah is also ...
If a Jewess married to a Jew has a child from a non-Jew is that child a mamzer? Is there agreement amongst the poskim about this?