If I can summarize what I got out of an exchange with @tomzheng in that thread a few months ago, he’s building a system that allows him to parse structured titles to declare relationships between tiddlers, which might then also let you derive additional facts. So for instance the title John Adams was married to Abigail Adams would be parsed by an explicit married to rule and assert a relationship between the tiddlers John Adams and Abigail Adams. His idea was that this would allow some recursive parsing to build up larger such relationships; his example was “Tom’s sister is Jerry’s sister’s teacher”.
While there are some very interesting ideas in there, I was never convinced that I would ever have any need for such a tool. And no, I don’t see that it has anything to do with this thread.