On a difference between English and Greek and its theoretical significance

This paper tries to rethink the properties of two types of coordination in English and Greek. It argues that the different behaviour of "and" and "with" coordination in English are the result of the fact that while "and" does not provide a syntactic label "with" does. In Greek, however, neither does resulting in different behaviours. If this is correct we have to accept two higher level conclusions. First, that the (non)-labelling nature of a category can capture linguistic variation and perhaps it is a parametric property. Given that this is not an inflectional category, if I am correct then there is evidence for variation that, although ultimately located in the lexicon if we assume that there is a feature [LABEL], it concerns the only thing that is determined internally to the computational system. The second conclusion, connected directly to the first, is that labelling is a process necessary for the syntactic computation and is neither determined by nor determines interface properties.