Acknowledgements
Alexandra Aikhenvald inspired this essay and provided invaluable feedback. I am also most grateful for the detailed comments provided by Nerida Jarkey, Luca Ciucci, Katarzyna Wotjylak, and René van den Berg; and for the more general ones from Anne Storch, Hannah Sarvasy, Lars Johanson, and Peter Matthews. Brigitta Flick and Joelene Overall provided valuable assistance in proof-checking.