Unfortunately, this is not a matter that can be quickly put to rest. The issues at play are many, and involve the free will of man, the engagement rules that govern alien interaction with man, the engagement rules that govern alien interaction between orientations, and the mutability of truth itself. Different people see truth in different ways. In all of this rises the issue of whether a given alien message, such as ours, is truly from ourselves or Nancy's imagination or government psychics. Psychics can insert themselves into others thoughts.
Imaginative humans can and do concoct intriguing stories.
And the truth can be before you, unrecognized and even rejected. It is for you to judge, listening with your heart and pondering with your mind. And when you have determined what is true, for you, then this you should hold to. It is, at essence, a matter of faith.