“In fact, an information theory that leaves out the issue of noise turns out to have no content.”

— Hans Christian von Baeyer

Source: Information, The New Language of Science (2003), Chapter 13, Electric Information, From Morse to Shannon, p. 121

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Hans Christian von Baeyer 25

American physicist 1938

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von Baeyer did not originate the quip about time, which dates back at least as far as the 1929 book "The Man Who Mastered Time" by Ray Cummings, where it appears on p. 1 http://books.google.com/books?id=YdZEAAAAYAAJ&q=%22everything+from+happening+at+once%22#search_anchor.
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“In fact, an information theory that leaves out the issue of noise turns out to have no content.”

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