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Thursday, June 25, 2009

'Information' a definition

Exactly what information is (at least one very useful technical definition of it) is answered by the mathematical theory of information. A rich field with many applications to biology, linguistics, and electronics, the theory is couched in the language of bits, each bit of information conveying one binary choice. [Hence 5 bits, for example, convey 5 such choices and are sufficient to distinguish from among 32 (or 25) alternatives, there being 32 (25) possible yes-no sequences of length 5.] Bits serve too as units in the numerical measure of such notions as the entropy of information sources, the capacity of communication channels, and the redundancy of messages.
Source: Paulos, J.A., (1991) Binary numbers and codes, Beyond Innumeracy, p.26.

Additional links:

W2tQ 'information'

W2tQ 'Ye Olde paper: 1996 "Humans, information and science'

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