Thankfully, John Reasnor then re-pasted a comment from before that I had not seen, which clears it up.

//A few notes on this. The Theonomic position (which, by the way, is hotly debated among theonomists) is not that there is no need for witnesses. Rather, the Theonomic position is that one witness is sufficient for a bare minimum conviction given other factors and given an actual judicial deliberation. It is not an automatic conviction based off of no witness or one witness. It is the principle that in some circumstances wherein witnesses aren’t possible apart from the one abused or assaulted, and the abused is someone under the power and authority of the accused abuser, then the sole witness of the alleged abuse victim can be taken into account. It’s not that one witness seals the deal. It’s that the one witness can be seen as legitimate testimony and if all other things are deliberated and judged, that one eye-witness is sufficient for conviction.

It is important to remember that God’s Law is not a wooden equation wherein we input a witness’s testimony and that it is automatically believed and there’s an automatic conviction. There’s an actual trial. Especially for crimes worthy of death. In certain specific situations the minimum requirement (and it’s just a minimum requirement) is lowered. This principle by no means would imply that someone could just lie and the person that is falsely accused doesn’t stand a chance. It’s not like that at all.

I don’t know if others consider themselves theonomists or not, but I certainly do. Either way, I can only speak for myself and my views.//

Even on the basis of two or three witnesses people are not to be stoned without due process, deliberations, other considerations such as physical evidence, and so on. This is about a BARE MINIMUM standard. Not about quickly killing people because one person said they were raped.

How easy would it be for two close friends collaborate and accuse someone of rape? It’s the same problem. Which is why there’s due process, whether it’s the standard two or more witnesses or the exception of one witness.