What is intelligence?

How is intelligence measured?

Is there a metric for intelligence? If so, how is it defined?

Is artificial general intelligence distinct from human intelligence? If so, what is the difference?

What is instrumental intelligence?

What is the entity that has intelligence? Does intelligence need to be embodied?

Does intelligence imply an agent that is intelligent?

Does an agent have to have goals?

Can an agent change its goals?

If goals are expressed in terms of a utility function, what sort of mathematical object does that function produce?