Public policy doctrines for the exclusion of relevant evidence , in the law of evidence in the United States , encompass several types of evidence that would be relevant to prove facts at issue in a legal proceeding .
Which are nonetheless excluded because of public policy concerns .
Public policy doctrines for the exclusion of relevant evidence , in the law of evidence in the United States , encompass several types of evidence that would be relevant to prove facts at issue in a legal proceeding , but which are nonetheless excluded because of public policy concerns .