What is the telicity of ἐλθεῖν? In other words, does the (prototypical) notion of this verb have a natural endpoint?
There are two detailed, scholarly studies of this question available on the web (both in PDF) that come to different conclusions.
The first is a master's thesis by Rachel Maureen Shain, "The Preverb Eis- and Koine Greek Aktionsart" (M.A. diss., Ohio State University, 2009), which argues that ἐλθεῖν / ἔρχομαι is atelic but εἰσελθεῖν / εἰσέρχομαι is telic.
The other is a bachelor's thesis by A. J. Espinosa, "Coming and Going in Koine Greek: Deixis and Aspect of Ἐρχομαι" (B.A. diss, Yale University, 2010), which argues, contra Shain, that ἐλθεῖν / ἔρχομαι is telic and that it connotes motion to the deictic center.
Who's got the better of the argument?