The exception is wherever a witness commits the crime of perjury which is the offence of lying on the court. In that case, the testimony with the witness could possibly be used to point out that he / she lied in court. That is a quantitative research in which 439 https://riverzdgkr.alltdesign.com/the-best-side-of-what-are-the-five-duties-of-citizens-57735491