Evidence of Orangutan Intelligence :
In the ongoing research of orangutans and orangutan intelligence, there has been evidence collected of both social and physical intelligence. The physical signs of intelligence include: tool-making and use for problem-solving; insight and memory of space, time mental maps, and classification; concepts such as simple arithmetic and mirror self-recognition; and plan in advance innovate. The social evidence of orangutan intelligence includes deception, coalitions and alliances, mediation, reconciliation, consoling, empathy, intentions, imitation, teaching, culture, and language.
Concept and Tool Use :
Understanding Others & Social Learning :
Orangutans have been known to understand other individuals, especially when the other is hurt. In one instance, an orangutan helped a lost and injured adolescent female.