If there was a Zack or a Sephiroth in Radiant Garden, Cid would surely know them by now. Ven appears confident in his knowledge and is happy to help so the man has no reason to doubt him, but one would assume these names would be familiar. Unfortunately, they are not, and this makes him suspicious.

He lowers the map again to ask more questions. "Who're Zack and..." His nose crinkles as he stumbles through a poor pronunciation. "Se-phy-roth?" His face then smooths out. "I ain't heard of them before. You know these two too? What are they like?"