Parallelism, overstatement, and appeal are demonstrated through various phrases.
Parallelism is demonstrated in the phrase "To err is human, to forgive is divine" as it presents two parallel ideas with a similar structure. Overstatement is shown in the phrase "Millions will be affected by the traffic" where the impact is exaggerated for emphasis. Finally, the phrase "On the other hand, he couldn't be more incorrect" exhibits an appeal to logic by contrasting ideas.
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