> I think Nils explained the situation pretty well.   Making max/min be
> "mathematical" would definitely require some nontrivial effort.

Why? 'max_symbolic' and 'min_symbolic' already do the job, don't they?

> I don't
> know that I'm in favor of adding a third boolean option,

http://www.sagemath.org/doc/reference/misc/sage/misc/unknown.html

> though of course
> Maxima has various outcomes for e.g. limits.  But again, doing that properly
> would require pretty substantial work.

We cannot be satisfied with returning wrong answers in the meantime, however.

    sage: bool(sin(x) <= 100+cos(x))
    False

Returning 'Unknown' instead of nonsense would be a good first step.

Nathann

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