The Rise and Fall of D.O.D.O. (D.O.D.O. #1)

by Neal Stephenson

Now, in a classical physics way of thinking, it’s either one or the other. The cat is either alive or dead for real. You just don’t happen to know which. But in a quantum physics way of thinking, the cat really is both alive and dead. It exists in two mutually incompatible states at the same time. Not until you open the lid and look inside does the wave function collapse.”