Knock! Knock! Who's there?

[Seth Jerchower, Ph.D.]

One more thought on query 2:

Note that the respective syntagmata for Hebrew and Italian are:
1.	"Ani talmid" [PRO Nom_Pred]; syntactic copula.
2	"Sono studente [COP Nom_Pred]; subject pro-drop with formal copula.

I'm not aware, in my limited knowledge, of any language that in one way or
another (sub_pro, COP, V, marker) doesn't specify a syntagmatic referent
with respect to the nom_pred; that is, is there any known language in which
the nom_pred suffices for its subject referent as well (*"Student", meaning
"I am a student")?

SJ