In the scriptures intelligence is often equated with knowledge, or at least knowledge comprises a significant portion of intelligence (as it does to some degree on modern intelligence tests). Joseph Smith stated that he "received instruction and intelligence" from Moroni each time Moroni appeared to him (see JS-H 1:54). In this instance intelligence implies knowledge but intelligence is not exactly the same as knowledge; I will demonstrate the difference in a little bit. First it is important to point out that Joseph received instruction - he was taught - and he received intelligence. Both were gifts given by Moroni.
We already know that intelligence is the light of truth (see D&C 93:29). Notice that intelligence does not equal truth, intelligence is the light of truth. Elsewhere intelligence was referred to light and truth (see D&C 93:36). I believe these are two slightly different uses of the word intelligence. The light of truth is like the light of Christ - the effects and power of the Holy Ghost given to all creatures that helps us understand right from wrong, within our spheres. Light is energy and power. Light gives power to truth - it is the power of truth. When intelligence is light and truth is truth that is edifying, clarifying, and powerful. It is superordinate to truth, meaning that truth, at least in this meaning of intelligence, is a subset of intelligence. Does this mean that there is truth without light? I believe so. There is truth in hell, there is truth in outer darkness, but there is not light.
We also learn more about intelligence from Joseph Smith: "Truth is independent in that sphere in which God has placed it, to act for itself, as all intelligence also" (D&C 93:30). Intelligence is independent and able to act for itself within its sphere of existence. Intelligence has the independence of agency. This implies that there is some sort of life (even if it is not distinct from power) to intelligence (and truth!). This brings us back to Joseph receiving intelligence from Moroni. Joseph received light and truth; he received the light of truth. He did not just receive knowledge, although knowledge can be part of truth and intelligence (however not all knowledge is true or intelligent or good, which is why Joseph did not just receive knowledge but also intelligence). He gained more of the light of Christ. He gained more of the power of truth.
Link to part 2 of this essay.