Is Our World a Simulation.

One of the recurrent trends of the past few decades has been the attempt to derive the science of physics from the science of information.  Whereas at one time, the atomic theory prevailed in physics and its various derivatives systematized ultimately in the form of quantum mechanics,  a new understanding sees the universe as ultimately composed of informational bits.  With this understanding comes a novel idea, likely advanced because of the rise of modern computers and the internet, that our world is in fact a simulation.  This notion has been advanced and it has been suggested that a sufficiently advanced future computer program could effectively simulate our world.  This raises further questions as to what is the nature of reality and whether it would ever be possible to recognize that we are in fact in a simulation.  An heroic stance would maintain that perhaps someday we could come to know this, though the possibility of ever achieving this remains difficult to understand. If there exist glitches in the simulation then how would we ever be able to come to locate them and know what they are.  Perhaps our physical death is the ultimate "glitch", and our present reality is different from the reality that we currently understand ourselves to have.