The classic case, Ministering Angels v. Moses, reported in the Talmud, has been public knowledge for millennia. Only recently, however, has the complete story come to light. Here is the entire dialogue as reconstructed from some of the declassified transcripts.

The greatest conspiracy theory of all time is materialism. The second greatest conspiracy theory is that the Jews invented the Torah...

To explain that, I would need a long conversation with you about what is G-d and how G-d talks to people and why....