" But, even if the quantum state gives us only probabilities for what we observe, once we get a result, there is something that is definite, because afterward you know exactly what the state is. It is the state corresponding to the result obtained by the measurement. Suppose we measure an electron’s momentum, and get the result that the electron is moving north with momentum 17 (in some units). Then, just after the measurement we know that the "

― Lee Smolin , Einstein's Unfinished Revolution: The Search for What Lies Beyond the Quantum