Yes, I agree with you. My question was poorly written. I have heard (read) others talking about Unlinked Mentions and I have always thought that they could be really useful. But, as you pointed out, with file names using dates or unique identifiers they will never be linked up. Or, I suppose I could write a sentence and casually slip in 202009190830 so I get an unmentioned link hit. But doesn’t that mean I have actually mentioned it?
Your comment about looking at body content as well as titles sounds great!