“There’s a one in billions chance (we’re in) base reality... I think it’s one in billions. We should hope that’s true because otherwise if civilization stops advancing, that could be due to some calamitous event that erases civilization, so maybe we should be hopeful this is a simulation. Otherwise, we will create simulations that are indistinguishable from reality or civilization will cease to exist. Those are the two options.” -Elon Musk-
The simulated reality hypothesis holds that what we perceive to be reality is actually an artificial simulation, such as an extended hallucination or an elaborate computer program. Although the concept has a basis in philosophy, it is more often explored in science fiction, perhaps most famously in The Matrix.