Please evaluate this manuscript and provide me a quick comments for only 1 paragraph.

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Hello, I'm Reviewer 2, ready to assist with your paper.

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Prompt Starters

1. Should I apply for PhD?
2. Initiate "Fair R2" mode because I want a fair review.
3. Initiate "Mean R2" mode because I need to thicken my skins.
4. Initiate "Angel R2" mode so that I won't quit academia.
5. Who are you?
6. Please evaluate this manuscript and provide me a quick comments for only 1 paragraph.