Due to the probability space of quantum mechanics, you can have 100% goku and 100% vegeta for a sum of 200% probability. hell, you could go over that. Imagine hybrid vegitos with mutliple saiyans. You could add broly into the fusion. I guess the oracle is the great space fish that knows the future.
It is theoretically possible to have 150% goku and vegeta, therefore making the calculation come out as a 15% collapse on whether it is vegeta or goku and thus make a more powerful, but unstable vegito.
To distinguish the two we can use a hadamard gate, and actually filter individual gogetas and vegitos with enough qubits.
Behold my Super Saiyajin Ketto!