Trevize stirred restlessly. “I believe this is a common speculation in quantum mechanics—a very ancient one, in fact.” “Ah, you’ve heard of it. But let us go on. Imagine it is possible for human beings to freeze all the infinite number of Universes, to step from one to another at will, and to choose which one should be made ‘real’—whatever that word means in this connection.” Trevize said, “I hear your words and can even imagine the concept you describe, but I cannot make myself believe that anything like this could ever happen.” “Nor I, on the whole,” said Dom, “which is why I say that it
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