I'm very confused as to how qubits function. I understand that qubits can represent 2^n classical bits due to superposition, but I cannot find an explanation as to how the qubit can "parallel process" if you will. How could the qubit represent 2^n bits if, whenever it is measured, you still only get a classical number of states? In other words, in the case that you find the electron in the spin down state how did the spin up state aid in the computation? If by definition the other state is never measured how could it affect the outcome?