== Terminology as theory == 

 Much of the article, and the comments here, are written as though there were a 'thing' which has the name 'infinitive'. Actually, linguistic terminology, like scientific terminology, arises from and is embedded in theories about language. English used to be described as if it were a language like Classical Latin or Greek; in this framework, an English 'infinitive' is whatever seems to be analogous to an infinitive in those languages. It's questionable whether 'infinitive' is a useful term at all in a truly stand-alone description of modern English. If it is, the case needs to be made purely in terms of modern English, and not by reference to other languages. 

 A similar argument applies to modern Greek. To call the form of the verb which is used after the auxiliary έχω (to form various tenses which didn't exist in classical Greek) an 'infinitive' is hard to justify by any definition. The form can't be used anywhere else, which is quite uncharacteristic of infinitives. 

 More generally, the entire article is grossly under-referenced. Inline citations are needed all over it to demonstrate that editors are not just expressing their pet views.