We recently made some changes so that the “your topic is similar to…” code uses title and body to try to detect duplicate topics as you type.
Here it is in action on this very post after I paused typing:
This may only apply to @leedohm and @AbeEstrada but we would like feedback on how well this feature is working. I know there are a lot of duplicate topics here and this is a difficult problem – at some level you can’t force users to read and if they are oblivious about creating a duplicate topic there’s no way to physically stop them – but I want to make sure our duplicate check panel is functioning.
So the next time you see (or create) a duplicate topic, try mock creating a new post and see if the Your topic is similar to… code would actually have shown the user a valid duplicate target?
I know duplicate topics is a big, tough problem. If there are any suggestions about ways we can improve this beyond the body check that @eviltrout added recently (prior to that the panel was based exclusively on post title), please let us know.