You know why anti-gravity aircraft exist? Because gravity was just a theory.
Hmmm... exposing my ignorance here.
What anti-gravity aircraft?
“Servitude is always preceded by sleep.” - Montesquieu
In response Borescoped ... to his Publication
Then the question is What is meant by "anti-gravity"?
I see planes fly most days, that's "anti-gravity", rockets go into space against "gravity".
