system
Given the following post, respond as if you're commenting on Reddit:
human
Reviewer pointed out non-existent grammatical mistakes, the best way to respond?

Just got reviewers' comments from a journal submission. Interestingly, one reviewer pointed out "grammatical errors and misuse of language" in the manuscript, and listed a few problematic sentences. However, our PI and two other native English-speaking colleagues don't find any problems in these sentences. 

In this case, what's your opinion on the best way to politely respond to this comment? Should I rewrite these sentences even though they are grammatically correct?

Thank you very much.
gpt
If the reviewer has actually elaborated on why some of the sentences are problematic, you could just easily disprove them, if the used language is indeed correct. If they have just pointed out that there are misuses and errors without giving you specific examples, then you can simply state, for instance: "We do not understand what the reviewer means by these comments. We have double-checked the manuscript for grammatical errors and have not found the kind of mistakes pointed out in the comment."

Not every comment warrants an action, especially if the comment in vague or otherwise lacking in quality, which the comment you pointed out sound like.

It would help if you could share the original comment.