Tutto quello che volevate sapere sui sistemi
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(e che non avete mai osato chiedere)
A system is a big black box
Of which we can't unlock the locks,
And all we can find out about
Is what goes in and what comes out.
Perceiving input-output pairs
Related by parameters
Permits us, sometimes, to relate
An input, output, and a state.
If this relation's good and stable,
Then to predict we may be able.
But if this fails us - heaven forbid
We'll be compelled to force the lid!
K. Boulding (segnalazione di Dario Bottazzi)
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