According to most dictionary definitions for "intelligence" the bar is quite low for a system to be considered "intelligent"
- The ability to acquire, understand, and use knowledge.
- the ability to learn or understand or to deal with new or trying situations
- the ability to apply knowledge to manipulate one's environment or to think abstractly as measured by objective criteria (such as tests)
- the act of understanding
- the ability to learn, understand, and make judgments or have opinions that are based on reason
- It can be described as the ability to perceive or infer information; and to retain it as knowledge to be applied to adaptive behaviors within an environment or context.
I think that a good definition for consciousness is the subjective experience of it feeling like something to be. It's the fact that there's qualia to existence. I don't see a reason for why we would need to solve the hard problem of consciousness in order to define a term we use to describe it. As far as I know we don't understand gravity either but everyone still understands that term.