At the bar from Ocean's Eleven (2001), professional thief Danny and his former partner Rusty are watching TV:
Danny: Saul makes 10. Ten should do it, don't you think? You think we need one more? You think we need one more. All right, we'll get one more.
How does Danny assume Rusty’s agreement without a verbal reply?
In the novelisation (and script) Rusty shrugs noncommittally. Danny is the undisputed expert here, and if he thinks they need one more, then they need one more.
DANNY: Ten should do it, don't you think?
(as Rusty shrugs)
You think we need one more?
(as Rusty shrugs)
You think we need one more.
(as Rusty shrugs)
Okay. We'll get one more.
In the film Rusty is simply passive and Danny is using him as a sounding-board. We (and Danny) can assume that if Rusty had disagreed, he'd have said something.