Erdös number update

My previous post requires an update, since I received a note reminding me that Ed Keenan also published with Jonathan Stavi, ["A semantic characterization of natural language determiners," Linguistics and Philosophy (1986) 9:253-326]. Stavi has an Erdös number of 2, in virtue of two different collaborations with Erdös coauthors Menachem Magidor and Marcel Herzog. This makes Keenan's number a rare 3 (very low for anyone primarily in linguistics), and my own a more interesting 4. This type of game is what passes for a hobby among mathematicians.