Bopope casts a wide net slandering folk all around. But the law says clearly that you personally must have knowledge of an act. Thats it. Heresay is not knowledge. The Bible is also clear on the act of testimony, You may not testify against someone without true knowledge of the act. This is the standard of law for good reason.
Some folk would swear on the bible that a witch inspired other people to act as if the devil possesed them. Some of the accused drowned proving nothing.