Use a footnote, but add entries for any/some to the table and use the description to say they are not implemented and to use bool_and/bool_or instead, then anchor the footnote at these entries.
Honestly, I'd like to remove all footnotes. The watermark identifying them is so small that many people don't even see that it's a link, and the fact that it's at the bottom of the page makes it even more isolated from the text it refers to.
Another thing I've been thinking about is the "see below". Because it doesn't have a link and in some cases is placed within a large paragraph, that "see below" appears very far away, and the user also doesn't know how to find it.
Perhaps we can find a better way to display notes, footnotes, and see below.
