This is the patented "Scheherazade" method of keeping your mouth shut.

It can work in some cases when confronted by a demanding enemy after information. You just need to be sure you're actually making up false information.

Transcript

GM: Captain Antilles, you're captured and dragged in front of the dark figure.
Clone Trooper Commander: The Peace Moon plans are not in the main computer.
Darth Vader: Where are those plans, Captain? Tell me or I'll kill you.
Captain Antilles: I'm not telling you, you slime bucket!
GM: He's giving you a way out. Without being killed this time.
Captain Antilles: I don't care! I'm not talking!
Captain Antilles: I'm not saying anything about how we stole the plans... or if we did steal them... which I'm not saying.
Captain Antilles: In the confusion of that battle where Kyle Katarn bravely sacrificed himself, anyone could have stolen those plans!
Captain Antilles: Assuming there was a battle on Danuta, which is only hearsay as far as we're concerned.
Darth Vader: Enough!
Captain Antilles: Fine then, I won't tell you anything about how... or whether... Bria Tharen... or anybody else... transmitted the final piece of the plans from Toprawa before taking her own life to avoid capture.
Darth Vader: How about you shut up, or I'll kill you?