τίς οὖν ἡ ταύτης περιουσίαν → what is its chance of being saved
really, in sooth: P. and V. ἦ, Ar. and V. κάρτα (rare P.), δῆτα, V. ἦ κάρτα.
in oaths (etc.): P. and V. ἦ μήν.
in maxims: P. and V. τοι (enclitic).