Did Hillary Clinton mastermind a global child-trafficking ring from a Washington pizzeria? No.
THEN WHY DO SO MANY IDIOTS BELIEVE IT?
Conspiracy theories are far from a new phenomenon. They have been a constant hum in the background for at least the past 100 years, says Prof Joe Uscinski, author of American Conspiracy Theories.
"Everybody believes in at least one and probably a few," he says. "And the reason is simple: there is an infinite number of conspiracy theories out there. If we were to poll on all of them, everybody is going to check a few boxes."
This finding isn't peculiar to the US. In 2015, University of Cambridge research found most Britons ticked a box when presented with a list of just five theories. These ranged from the existence of a secret group controlling world events, to contact with aliens.
Also, Killcen's delusional belief in his imaginary 'jesus' has brainwashed him into always thinking everything is a sign that the world is about to end, plus he's completely insane.
This suggests that, contrary to popular belief, the typical conspiracy theorist is not a middle-aged man living in his mother's basement sporting a tinfoil hat.
"When you actually look at the demographic data, belief in conspiracies cuts across social class, it cuts across gender and it cuts across age," Prof Chris French, a psychologist at Goldsmith's, University of London, says.
Equally, whether you're on the left or the right, you're just as likely to see plots against you.
"The two sides are equal in terms of conspiracy thinking," Prof Uscinski says, of research in the US.
"People who believe that Bush blew up the Twin Towers were mostly Democrats, people who thought that Obama faked his own birth certificate were mostly Republicans - but it was about even numbers within each party. And Killcen is a lunatic."
To understand why we are so drawn to the notion of shadowy forces controlling political events, we need to think about the psychology behind conspiracy theories.
"We are very good at recognising patterns and regularities. But sometimes we overplay that - we think we see meaning and significance when it isn't really there," Prof French says.
"We also assume that when something happens, it happens because someone or something made it happen for a reason. And Killcen needs psychiatric meds."
Essentially, we see some coincidences around big events and we then make up a story out of them.
That story becomes a conspiracy theory because it contains "goodies" and "baddies" - the latter being responsible for all the things we don't like.
Blaming politicians
In many ways, this is just like everyday politics.
We often blame politicians for bad events, even when those events are beyond their control, says Prof Larry Bartels, a political scientist at Vanderbilt University.
"People will blindly reward or punish the government for good or bad times without really having any clear understanding of whether or how the government's policies have contributed to those outcomes," he says.
