The article Spontaneous creation of the universe from nothing (Dongshan He, Dongfeng Gao, and Qing-yu Cai) published by the American Physical Society discusses a mathematically proof that the universe could be spontaneously created from nothing using the Wheeler-DeWitt equation (pictured below). It seems that, despite the proof Dongshan, et al provide, their argument requires the universe to start with many physical laws and quantum properties built in which seems to negate a true conception of absolute nothingness. However, given the premise of the universe starting as nothing, couldn't T-symmetry and simple mathematical properties explain this? Given the equation 0=0, you can theoretically perform an infinite number of calculations as long as you did them for both sides or included the reversal of those equations. You could start with 0 and add every quantum state and physical interaction over the history and future of the universe and as long as you also perform the reverse of those states, i.e. T-symmetry. Am I missing something here?