Fred Melamed

Review: A Serious Man

According to the Shrödinger's Cat paradox, if you put a cat in a sealed box with a vial of poison that has a 50-50 chance of being released and killing the cat (sorry cat lovers), then until the box is unsealed, the cat is neither alive or dead. It exists in both states until the box is unsealed and the cat is observed to be one thing or the other.