We can measure individual facets of intelligence too. It gets much more complicated when talk about 'general' intelligence and spectrums of intelligence and how they interact with each other.
> I still have not seen anyone adequately explain what "intelligence" actually is.
A formal definition would be useful, but not strictly necessary. "More capable at task X", where X can range over all non-physical/information processing tasks is sufficient.
So if we dont know, or cant agree what it is... how can we be claiming what we've created is artificial?