In Ocean's Eleven (2001), a casino employee named Eddie is talking to Terry Benedict about Lyman Zerga (actually Saul Bloom in disguise):
EDDIE: Mr. Zerga. Lyman Zerga, in the 3rd position. Wishes to speak with you privately.
BENEDICT: Who is he?
EDDIE: Businessman of some kind, mostly in Europe. Very vague, but I asked around. Word is, he deals primarily in arms. One of the biggest.
BENEDICT: Zerga.
EDDIE: Yes, sir.
BENEDICT: Never heard of him.
EDDIE: That's why I don't doubt it.
I believe the implication is that the best arms dealers are secretive and wouldn't spread their names around. But that seems backwards to me. As a multi-millionaire, wouldn't the fictional Lyman Zerga want someone like Benedict to know about him?
Most importantly, why would "not hearing of him" lead Eddie to believe that Zerga is legit?
If Lyman Zerga was a fictional character that was playing them (which he was), then you would definitely expect that Benedict would not know of him. So why should that be evidence that he's for real?