How we cite our quotes: All quotations are from The Usual Suspects.
Quote #4
KEATON: His name is Verbal. Verbal Kint.
MCMANUS: Verbal?
KEATON: Yeah.
VERBAL: Roger, really. People say I talk too much.
Verbal talks too much—and he also speaks in wild, improvisatory lies that totally convince Kujan. Since Kujan thinks Verbal talks too much, he thinks Verbal is revealing things about Keaton that he doesn't intend to reveal—but that's exactly what Verbal is trying to do.
Quote #5
VERBAL: That was how I ended up in a barbershop quartet in Skokie, Illinois.
KUJAN: That is totally irrelevant.
VERBAL: Oh, but it's not. If I hadn't been nailed in Illinois for running a three card monte in between sets, I never would have took off for New York. I never would have met Keaton, see. That barber shop quartet was the reason for everything.
As Keaton discovers at the end, this barbershop quartet was just something fabricated from the label on the bulletin board, which was made by a company called Quartet, in Skokie, Illinois. So, even if it's not the "reason for everything" it is a clue that tips Kujan off—all too late.
Quote #6
KUJAN: Dean Keaton was dead. Did you know that? He died in a fire two years ago during an investigation into the murder of a witness who was going to testify against him. Two people saw Keaton enter a warehouse he owned just before it went up. They said he had gone in to check a leaking gas main. It blew up and took all of Dean Keaton with it. Within three months of the explosion, the two witnesses were dead, one killed himself in his car and the other fell down an open elevator shaft.
This is evidence that Keaton is a deceitful and malevolent dude. It contradicts the rosier picture of Keaton that Verbal tries to paint.