Are we living in a computer simulation?

I Know, I'm a little behind the times, but i have just read this article. My first thought was "EEUUGGH" but then luckily i found the dumbed down version and was just about able to grasp the idea.

I would like to put forward the idea that we may never find out whether we are in a simulation or not, as if we are in a simulation theoretically surely we will never get to the point when we develop this technology, because we are simulations. If this is the case and we are simulations then we will only find out if our simulators wish to allow us to know. Which is plausible as i am sure they are nice people at heart, even though they could've simulated a utopia for us to exist in, but i'm sure if they are historians they would prefer to keep things realistic. So, if we are living in a simulation and our simulators are historians then theoretically we will never get to know the truth (which means we could end up assuming that we are not in a simulation and be very wrong in this assumption). Also, if we are in a simulation does that mean that we re-run the same period of human existence over and over or are we left to mature as our simulators did, in which case we would have to have the ability to reproduce, and how does that work in a computer simulation? And, if we are left to continue to progress do the simulators have thouseands of different simulations in which they re-start humanity from different points and throw in new, or original problems for us to solve. Does hirtory repeat itself, or is there a different outcome each time? is this what the simulators are studying, are we mearly rats in a cage, reacting to electric shocks and yet still wanting the cheese?

OR, is there a massive expanse of space somewhere in which there are many different compartments, each containing it's own simulation, and ours has simply been left on by accident, draining all the energy running up the electricity bill and no one realises?