What if TOE is "non-analytic"? I mean, what if there is a set of TOE equations, but there is no way to derive all notions we want to derive (space, time, gravity, number of generations) from it analytically. And the only way to do it would be a huge numerical simulation? I had already happened in QCD. AFAIK there is no formula for say Mneutron/Mproton based on the quark masses and parameters of the Standard Model - it comes from experiment and/or simulation (but in fact quark masses are calculated based on that to fit the answer) So even if we knew TOE equations if would be extremely diffuclt to derive Standard Model from TOE. But going back would be even more difficult - almost impossible!