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"One type of entanglement involves spin, where two entangled particles will always have opposite spin (coming from conservation of angular momentum). The wave function tells you the probability of a single particle's spin at any point in time. You repeatedly measure one particle's spin and it obeys the wave function, but the second particle's spin, so long as it's measured after the first particle is measured, will always have opposite spin from the first (i.e., it won't obey the probabilities given by the wave function).