Quantum theory kept showing that at any particular moment an object like an electron or photon could be a wave or a particle but not both, or could have an up spin or a down spin, or a horizontal or a vertical polarization, or could be here rather than there, and which properties it would be observed to have could never be predicted ahead of time. The process of materializing or appearing in one way rather than another involved an instantaneous change in the object’s wave function, which, as we’ve seen, was a strange preexistence as a kind of blurry potential or probability, one that had not
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