I was running a search on a labeled group of messages (from a mailing list) in my mailbox, looking for just the unread ones, but I was also doing something else at the same time (actually two or three other things, drinking coffee, firing up a YouTube video, looking for a file on my desktop) and I ended up typing “is:unclear” instead of “is:unread.”
But maybe a good email search could find the messages in your inbox that are unclear?
