If that's true, then there might be a virtually infinite number of simulations out there, so the chances that we're one of them are actually much higher than the chances that we're not.
Then there's physicist Silas Beane from the University of Bonn in Germany. His theory is that, if we are actually living in a computer simulation, then our universe should have a "resolution" -- in other words, there should be a limit to how small something can be, just like nothing can be smaller than the pixels on your computer screen.
Now, is the universe in VGA or super VGA?
And, incidentally, they have found such a limit. It's something called the Greisen-Zatsepin--Kuzmin or GZK limit. It's about as technical as you'd expect for something with that many hyphens and consonants, but Beane thinks it might be the first evidence that the world around us is made up of artificial bits created by some other intelligence. Of course, this evidence might not be that compelling by itself, but Beane and his colleagues are busy thinking up new ways to detect the computer we might be living in, presumably by mapping the universe in search of the Blue Screen of Death.
Congratulations -- proof we're all living inside a computer! Also, everyone's now dead.
As with all of the fringe theories on this list, there are those who scoff at such a notion. And they will continue to, right up to the point that a team of superpowered Matrix Agents storm their office.