This seems like a valid exception from this rule. The interesting tidbit here is what the title suggests, even though it is not the title of the paper. It shoul

This seems like a valid exception from this rule. The interesting tidbit here is what the title suggests, even though it is not the title of the paper. It should be possible to point out to facts like these hidden in papers, reports, etc without having to create a separate article about it. You can of course add a comment as you suggested, but that does not reflect how people use HN.