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Every piece of information that we deal with on a daily basis can be reduced to a sequence of two different symbols, e.g. zeros and ones or dots and dashes, as in Morse code. We can therefore say that information, like matter, has a granular structure with an "elementary particle of information" called a bit. Information is not usually static but is subject to continuous metamorphoses, in which computers help it by representing bits as electrical impulses. Computers are nothing more than certain physical systems. Following this path, we can conclude that in principle every fragment of reality is a kind of computer, processing or at least storing a certain type of information. But is this really the case? Does every physical process correspond to information processing that a computer could handle? Or, more generally, is our reality computable? In his lecture, Dr. Hab. Jakub Mielczarek, professor at the Jagiellonian University, will tackle, among others, the following issues: with these questions, and also consider what the quantum perspective brings to these considerations and whether it is possible to decide at all whether we live in a computer simulation. Dr. hab. Jakub Mielczarek works at the Department of Theory of Complex Systems at the Institute of Theoretical Physics of the Jagiellonian University. He deals with both quantum theory and the problem of complex systems. Co-founder of the Garage of Complexity - Laboratory of Creativity operating at the Jagiellonian University, as well as inventor, creator of, among others, the pe3Dish system for three-dimensional cell cultures. On his website https://jakubmielczarek.com he runs a popular science blog.