An electron is real; a probability is not. - Hans Christian von Baeyer

To put it one way, a collection of Shakespeare's plays is richer than a phone book that uses the same number of letters; to put it another, the essence of information lies in the relationships among bits, not their sheer number.

The problem of defining exactly what is meant by the signal velocity, which cropped up as long ago as 1907, has not been solved.

Nowhere is the difference between either/or and both/and more clearly apparent than in the context of information.