This is an extension of the term, insight which was identified by Wolfgang Kohler while studying the behavior of chimpanzees. He said that insight learning is a type of learning or problem solving that happens all-of-a-sudden through understanding the relationships various parts of a problem rather than through trial and error.
Sultan, one of Kohler's chimpanzes, learned to use a stick to pull bananas from outside of his cage by putting pieces of stick together. Given two sticks that could be fitted together to make a single pole that was long enough to reach the bananas, aligned the sticks and in a flash of sudden inspiration, fitted the two sticks together and pulled in the bananas. He didn't do this by trial and error, but had a sort of sudden inspiration or insight.
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