For a system to possess intelligence, it must be capable of
consistently producing a result matching criteria that circumscribe
a goal region. This capability must persist over a wide array of
changing conditions in a complex environment.
When a human is intelligent, the human will repeatedly achieve goals even when varied challenges appear along the path to the goal. The human adapts the way a localized collection of organisms within a species adapt to environmental changes over generations, but the human mind adapts quickly by eliminating approaches (solution ideas) instead of eliminating individuals within the collection of organisms.
The term Artificial Intelligence was intended to mean intelligence designed or programmed into a machine by humans. If the design of intelligence into a machine is possible, then it is likely that the mind is (as some have suggested) merely a biological machine. Therefore, applying the same definition of Artificial Intelligence, a student taught by a text book and some lectures must also be artificial. Education would be a set of capabilities programmed into a biological machine by humans.
Either way, the modifier ARTIFICIAL is meaningless. The presumption that humans (or machines) could act intelligently without literacy and education is pure fantasy. Such is a denial of the complex and gradual ascent of civilized thought.
Therefore, the minimum requirement for artificial intelligence, if one insists on the term, is the same as the minimum requirement for intelligence. For that, return to the first paragraph of this answer.