If there is a theory that describes everything then that would be a theory that the universe is infinity-dimensional. There even exists an interpretation in quantum mechanics that produces uncountably many universes just to get out of collapsing a wave function!
Simon, 9 years old
If the Universe is not random, it’s made of zeros and ones! I worked it out because quantum mechanics describes elementary particles as probabilities. So if it’s deterministic, there’s no gray zone – things can either definitely happen or definitely not happen. And if the Universe is stochastic, it’s also made of other numbers in between zero and one.
Simon, 8 years old