It’s a logical conundrum. Of course one is correct in saying “There has never been a successful conspiracy theory” because once one becomes known it isn’t a “theory” anymore, it moves into the “fact” column. The discussion is retarded.
Rush said he did not believe in conspiracies. He did not say conspiracy theories.
The discussion is not a logical conundrum or retarded. Every police investigation begins with a “conspiracy theory” and works to make it fact, just as every scientific investigation begins with a theory and works to prove it or disprove it.