This is just to announce that my next paper will be on a universal path of grammaticization. I will claim that it is no coincidence that the infinitive is marked by an element that is synonymous with the allative preposition. Working title: to be or not to be plagiarised. https://twitter.com/haspelmath/status/1251130670291857409

Making good progress on the paper — in fact, writing has never gone so fast. Why haven't I tried this before? Finding a lot of inspiration in twitter discussions about setting ideas free

Quick sketch of what I've come up with so far. I propose to call this an "implicational map" as it shows a geometric arrangement of several (semantically or otherwise) distinguishable functions or uses that a grammatical element may have. Wonder what folks think of this lil' idea