LogFAQs > #926368852

superposition has a cause but its exact effect is unknown and unknowable. it's not semantics to say that if something is deterministic that you can calculate the result if you know the exact nature of the cause; that's the definition. in quantum mechanics, you can have as perfect as physically allowed information about a system, the wavefunction, and be unable to know exactly what the result would be. it's like if you had a die and were only allowed to know how many sides it had and no information about how it was thrown. you'd only be able to give probabilities for results, with two identical scenarios potentially yielding two different outcomes. non-deterministic