Some people when receiving "Possible duplicate" comment (if someone voted to close the question as a duplicate), take it personally and put angry comments, that historically their question was asked first, and shouldn't be closed.
Lack of clarity causes new questions to be raised such as Shouldn't the newer questions be marked as duplicate and not the earlier ones?
It will be good to add information/help icon (i) with the link to a clarification page to be like
or just make Possible duplicate clickable
The clarification page can be meta question Should I vote to close a duplicate question, even though it's much newer, and has more up to date answers? or a new service center help page with a similar content.