Agreed, but I think many of the ways that manifests can be acquired with experience if you're looking at one thing. I think the idea we are both getting at is capacity for learning, or quick thinking, and for that you need to see that person perform in a suitable environment, which the workplace is probably not providing.

And again, these are all components of intelligence but missing large parts of the bigger picture. What about the ability to make a point or debate well? Or charisma? Those are social skills, you might say -- social intelligence? So then is intelligence simply the sum of ones skills and ability to pick up new ones? Maybe, but then how does that apply to your specific situation?

My point is that intelligence is probably undefinable. "I am better/more experienced/more capable than this person at X and Y" is probably what you should be saying to yourself instead.