The universe a simulation? If you are reading these lines, the simulation does not oppose you in this, which is very strange ... If we live in a simulation, then nothing will change from the fact that we know it. The algorithm cannot leave the virtual world and materialize in the outer universe. Nevertheless, having a certain freedom of action within the model, the algorithm can understand that it is inside the simulation. Today I want to talk to you about how real our world is. What makes me think we are living in a simulation? The main thing is our universe itself. For all the time of its existence, universe has been constantly expanding. Universe moves absolutely freely, without encountering any obstacles in its path. Being material, our universe moves in some kind of immaterial space of the opposite nature. Our universe is a very strange place. When no living creature looks at subatomic particles (events), they have no definite state. In other words, objects materialize and manifest properties only when they are looked at. Let us recall the well-known experiment with electrons and a lattice. When particles changed properties depending on whether looked at them or not. In simple terms, our universe draws objects with detail only when living beings are looking at them. Like in 3D computer games. If no one is looking, then can save computing power by executing of algorithms without drawing details and objects. To the same savings in computing power can be attributed to the principle of least action. This is when a body or an object moves in such a way that the action (which depends on the trajectory of movement) is minimal. The fractal geometry of the universe can be attributed to the same category of saving computing resources. Fractals are self-similar elements in our nature. For example, riverbeds, veins in your arms, and lightning bolts all have the same geometric fractal look. In other words, the same algorithm is used to draw the details inside our simulation. Self-similarity allows not to create each new object once, but allows you to generate many self-similar objects based on one algorithm. Computer programmers such as the Zx Spectrum developers use self-similar elements to create the appearance of motion with limited CPU and memory resources. A few more hints at the virtuality of our world are given to us by quantum physics. Thus, the principle of nonlocal correlation raises a lot of questions. What it is? Let's say if you're wearing black shoes, somewhere on the other side of the world, another guy is wearing a green baseball cap. And when you're not wearing black shoes, the guy isn't wearing a green baseball cap. This is sounds strange, but this is how our universe works. Quarks, the elementary particles of which protons and neutrons are composed, exhibit a strange function of correcting their actions if scientists try to disrupt them. This weirdness is called supersemmetry. But the most important question in all this. Not who or what created our simulation. The main question is how much my text is predetermined by the program of this universe. After all, it is quite possible that the source code of our simulation contains the requirement to be aware of existence in the simulation. We also do not have access to knowledge about the physical properties of the world outside the simulation. We simply cannot appreciate them. In other words, we cannot analyze what is outside where our universe is moving. The only thing we can try to do is create unacceptable computational loads for the simulation in order to cause it to crash globally. I am still convinced that this is possible by exploiting vulnerabilities in the code, bypassing the inherent functions in a completely law of physics way. If you have ever hacked websites, then you will understand what this is about. The task is to get access to the system kernel by executing a sequence of standard system requests. This is possible with any algorithm. So in theory is possible hacking of the simulation.