Robert sternberg proposed the existence of three fundamental aspects of intelligence: analytic, creative and practical. he argued, however, that modern intelligence tests only measure skills.

The answer is "Analytic" skills.

Analytical intelligence is the capacity to dissect and assess thoughts, take care of issues and decide. The triarchic hypothesis of intelligence describes intelligence as unmistakable parts as opposed to as a solitary capacity. Defined in the 1980s by Robert Sternberg, the triarchic hypothesis recognizes three parts of intelligence as mentioned in the question.

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