Which of the following is NOT true in problem solving in artificial…

Answer: The statement "It works on or implements repetition mechanism" is NOT true.

Why the other statements are true:

• Implements heuristic search technique: Many problem-solving approaches use heuristics to estimate which states are promising, improving efficiency (for example, A* search).

• Solution steps are not explicit: The exact sequence of actions to reach the goal is often not provided and must be discovered by search, so the steps are not known beforehand.

• Knowledge is imprecise: AI systems often operate with incomplete or uncertain information; techniques like probabilistic models and fuzzy logic address this imprecision.

Why "It works on or implements repetition mechanism" is not true:

• Problem solving is characterized by defining an initial state, goal state, operators (actions), and using search strategies to find a path of operators from the initial to the goal state. While some algorithms may use repetition or iterative loops internally, repetition is not a defining feature of the problem-solving paradigm itself.

• Therefore, stating that problem solving "implements repetition mechanism" as a general property is incorrect; it may happen in specific algorithms but is not a core defining attribute.

Final conclusion: The correct NOT-true statement is "It works on or implements repetition mechanism" because repetition is not a general defining property of AI problem solving.