In the absence of side effects,normal order evaluation does not change the semantics of a program.

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Quizplus · Accepted Answer

Normal order evaluation means evaluating arguments before they are passed to the function. If there are no side effects (i.e. the function does not modify any state outside of its own scope), then the order of evaluation does not affect the result of the program. Therefore, normal order evaluation and a different evaluation order would produce the same result.

In the Absence of Side Effects,normal Order Evaluation Does Not