Which of the following is NOT a primary function of AI?

The primary functions of AI include tasks that machines are designed to perform effectively, such as understanding language, recognizing patterns, and interpreting visual data. Summarization, speech recognition, and visual data interpretation are all core areas where AI technologies are extensively applied. For instance, summarization employs natural language processing to condense information, speech recognition converts spoken language into text, and visual data interpretation enables machines to analyze and understand images and videos.

Human emotion analysis, while it can be facilitated by AI through techniques like sentiment analysis or facial recognition, does not represent a primary function of AI in the same direct and widespread manner as the other options. Rather, it is more of a byproduct or application of AI technologies, relying on varied data inputs and contexts rather than being a standalone core function. Thus, it stands apart from the more established functions in the AI domain.