Hi Michael,

> Like for example if you extruded something towards the
> outside to make a protrusion, but had it set to Boolean:
> Subtract, that would produce nothing since you would
> be subtracting something that is exterior to the solid.

In that case a message would pop up and inform you that nothing happened.
It's usually a step by step operation, the Boolean selection would always be reset to 'None'
So it's usually, pick curves to extrude then the next step would be to pick the Boolean operation if wanted.

> Is there some particular situation that you would see
> an automatic determination based on direction not doing the right job?

Yeah, when you don't want a Boolean operation at all.

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