Scientists know for a fact that matter is all there is. Anything which is not matter does not matter. Religion or religious impulse is the result of undesirable mutations in biological matter. Whatever is not science is religion. Only science may be taught.
Stuff happens, but only by coincidence.
An appeal for consistency is clearly in order. Our courts of law routinely decide cases on the basis of circumstantial evidence. If evidence supports a particular motive and course of actions, and if alternative explanations prove unreasonable, the jury or judge hands down a verdict, despite the absence of witnesses to the event. I see no reason why not.