“Presumption of Innocence” is a widely accepted doctrine in Justice System applicable in many parts of the world, which says that “A person should be considered as Innocent unless proven Guilty”. The same doctrine also states that it is the duty of the prosecution to collect the evidences to prove his/her charges against the accused and if reasonable doubt remains, then the person must be acquitted. It is also a Human Right under United Nation’s Universal Declaration of Human Rights.
So, if someone accuses you and ask you to prove your innocence, just tell them to refer to this doctrine. 🙂
(P.S. Do you recall a scene from the Bahubali 2: The Conlusion, where Bhallal Dev asks Devsena exactly opposite to the stated theory? That is why she terms it as a barbaric and heinous law. Sometime Bollywood does make sense, oh! wait, it wasn’t a Bollywood movie though 😛 ).