Answer them I will. But to do justice, since the answers will be critically examined, I will reply to all 4 questions when I have more time.
To start in part, a brief reply to question # 1:
You are currently looking for "head knowledge" about an event brought about by powers above the natural, physical world. That is not the way to "reliably know".
Why? The work is power that is above the natural. The event in the physical is one thing but encountering power from above is what you should witness, not a physical outcome.
When you see the "power" you can the discern if it is natural or not.
You will also have a small glimpse from "where" the power has come from. A real domain beyond and significantly above the natural we are so use to.
For those whose then say to the above reply "evidence please". My reply is like before - you must go to the Source, the Creator. You need to witness Him, not people and their words. You need to witness the His power from above, not listen to others experiences.
Second hand info is not what you should seek. So far that is all you have done and now have in hand.