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[not needed anymore- removed by CK]
Does it mean that you're going to change the tags on the sentences ?
Otherwise, I can't see why anybody would object to anybody handling lists...or did I miss something ?
I think these categories "OK", "Unsure", "Not OK"
should allways have the same basic meaning.
As far as I understand, their meanings are approximately as follows.
OK
According to the standards commonly respected in the concerning language.
Unsure
Something seems (to me) not quite right.
Somebody (more competent than me) should check whether this sentence is OK or not.
Not OK
Not according to the standards commonly respected in the concerning language.
In a comment beneath, I specified why and/or proposed necessary changes.
You may have better definitions, and every definition permits some interpretation (what is OK for one person, may be hardly acceptable for another one). But at any rate, I'm in favor of finding and sticking to common definitions. Otherwise the whole classification would become pointless, wouldn't it?
[not needed anymore- removed by CK]
If I can weigh in my own opinion...
Marking a sentence as "unsure" or "not OK" is like openly declaring there is (likely) something wrong with the sentence. Doing this is useful for learners using the site, as they will know to avoid using these sentences in their studies.
Because of this I'd say there is nothing wrong with marking unnatural and incorrect sentences as "unsure" or "not OK". In fact, I would encourage this.
However, I would advise against marking near duplicates as "unsure" or inappropriate sentences as "not OK", because this would communicate to other users that there is probably something objectively wrong with the sentence, when there is not.