sanonymous
Equivalent to being incognito.
An excellent example of being "sanonymous" is how ex-Prez Reagan infamously either feigned laryngitis or used da noisy Air Force One helicopter to drown out voices during unwelcome reporter-questioning ("Mr. President, the public has a right to know what you knew about Iran-Contra, and when you knew it."), so dat nobody could prove whether he himself had actually said da answers or not.