There was an episode in the second or third season in which a big-game hunter lands on the island and decides he wants to hunt humans instead. So he discretely interviews each of the castaways to determine which would present the greatest challenge for him. When he interviews the Professor (Jungian archetype for intelligence) he concludes that he'd have the professor bagged & mounted before the professor could figure out his next move.
The implication here is that there's an aspect of intelligence which suggests so-called intentionality, intelligence may be directed "toward" something, some problem, function, etc. Some problems are extremely complex and need some deliberation. Others are challenging in a different way, and need a snap/real-world decisions or cunning. Could be a language limitation also. We tend to confuse cleverness, wisdom, cunning, reptilian intelligence, memory, success, business or strategic/military knowledge, and learning ability all as "intelligence". I can't think of a single test which would gauge all of that.