Interested in Language
Please consider whether it is not necessary to include this item in the list.
Does the above sentence make sense? I'm not sure if I can use "whether it is not".
The asker thinks it is necessary. (He is actually saying "isn't it necessary?", but I don't want to use an interrogative because the original Japanese is not an interrogative.
Yes, it makes sense, but it is a convoluted way of saying, "Consider whether this item should be in the list, as I believe it should be." or even
"I advise you to consider putting this item in the list."
You seem to be translating formally. If so, the sentence is OK.