Simulation Theory in a Nutshell
I went too deep into it.
The idea that the world that we live in is not 'real' has been subject of many movies and TV shows most notably The Matrix, and more recently, Rick and Morty as well as Black Mirror. The Simulation Theory, proposed by Oxford philosopher Nick Bostrom in his paper "Are We Living in a Computer Simulation?" suggests that it is very likely that our reality is a simulated reality. That everything around us, and we ourselves are merely digital programs interacting with each other inside a digital cloud.
Bostrom postulates that the rapid advancement in technology will eventually lead to massive computing power in the hands of post human civilizations, and these post humans might use that power to create simulations of their ancestors. These simulated ancestors will be 'conscious' and to them the simulated world will look exactly like the world we live in today. To understand this consider that to a character in any advanced computer game, the simulated walls, the cars, the malls, and the people are 'real' as they are real to us in this 'reality'.
Similarly, in these highly advanced simulations in the future, there will be no way to tell for its simulated constituents if their reality is 'real' or not. Like the millions of copies of video games today, there could be millions of such simulations created by the highly advanced descendants of the 'Base' civilization. Now since there is no way to distinguish a simulated reality from the base reality, thus the mathematical possibility that we inhabit the Base Reality (the original reality) is one in a million (one base reality vs millions of simulated realities)
The characters in the games, as designed by today's gaming industry, are not 'intelligent' yet. But add the advancement in artificial intelligence and computing power and time, and the Simulation Argument seems persuasive. And if you think about the simulated realities maturing enough to create their own simulated realities (explored in the movie The Thirteenth Floor), the possibilities are mind-boggling and terrifying. To sum up, the drawing in this article is as unreal as its maker.