Stephen Falken: The whole point was to find a way to practise nuclear war without destroying ourselves. To get the computers to learn from mistakes we couldn't afford to make. Except, I never could get Joshua to learn the most important lesson.
David Lightman: What's that?
Stephen Falken: Futility. That there's a time when you should just give up.
Jennifer: What kind of a lesson is that?
Stephen Falken: Did you ever play tic-tac-toe?
Jennifer: Yeah, of course.
Stephen Falken: But you don't anymore.
Jennifer: No.
Stephen Falken: Why?
Jennifer: Because it's a boring game. It's always a tie.
Stephen Falken: Exactly. There's no way to win. The game itself is pointless! But back at the war room, they believe you can win a nuclear war. That there can be "acceptable losses."
Quotes from Ally Sheedy movies and TV shows
David: What kind of an asshole lives on an island and he doesn't even have a boat?
Jennifer: Maybe we can swim for it. How far do you think it is?
David: No, it's uh, 2 or 3 miles at least, maybe more.
Jennifer: Well, what do you say? Let's go for it.
David: No.
Jennifer: Come on!
David: No! I can't swim
Jennifer: You can't swim?
David: No, I can't. Okay, Wonder Woman? I can't swim.
Jennifer: Well, what kind of an asshole grows up in Seattle and doesn't even know how to swim?