[sdiy] OT: The spin of electrons!

[ASSI]

On Monday 04 January 2010, David Ingebretsen wrote:
> "All models are wrong, some are useful."

Wikiquotes delivers:

Box, George E. P.; Norman R. Draper (1987).
Empirical Model-Building and Response Surfaces.
Wiley. pp. p. 424. ISBN 0471810339.

I really doubt this is the first occurence of this entence, but 
anyway.  Here's another nice remark about models (and it's especially 
true of cats!):

"The best material model of a cat is another,
 or preferably the same, cat."

 -- Norbert Wiener with A. Rosenblueth,
    Philosophy of Science, 1945


Achim.
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