We do not claim that it is ‘scientific’ knowledge. It is the denialist’s error that proclaims that scientific truth is all there is or that it is the only kind of knowledge that matters. We all know, or should know, that it is silly to demand material proof for the immaterial, especially when we are talking about God, who is personal and who has a will, a will that we cannot manipulate.
It is quite analogous to the courtroom where testimony is integral to its proceedings, perjury is a felony, you are a jury of one and truth can indeed be demonstrated and determined. We have talked about the Perpetrator’s M.O. elsewhere.