For some reason the term "conspiracy theory" gets used only for the theories that are not the officially approved conspiracy theory.

And yet surely all theories about conspiracies are by definition conspiracy theories. The Boston Bombings, 911, Oklahoma, the Iraq War, all undeniably were conspiracies. They involved a number of people collaborating in secret to cause lethal violence.

The point always is, which theory about conspiracies is the correct one, and is it the whole story.