[glassounds]

It's not measurable externally perhaps if the mechanism sufficiently mimics intelligence, but I'd argue that to do that the mechanism actually needs to answer at least some of the criteria above. It's also not necessarily something you can't measure depending on how the AI is built and what it exposes.

Are bees intelligent or do we use the same language in this case as "intelligent design", i.e. the behavior is complex and impressive?

Also this murkier for animals since they do possess some of the traits I mentioned like learning.

Although as I said this was off the top of my head, not an official definition.