Puzzled by "is"

Erik Max Francis max at alcyone.com
Fri Aug 10 05:57:49 CEST 2007

Ben Finney wrote:

> It's important to also realise that the language is *deliberately*
> non-committal on whether any given value will have this behaviour;
> that is, it's entirely left to the language implementation which
> optimisation trade-offs to make, and the language user (that's you and
> I) should *not* expect any particular behaviour to hold between
> different implementations.

Right.  In the terminology of language standards, it is implementation 

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