I've noticed that many droids in the Star Wars universe--specifically K-2SO and C-3PO--say a lot of things about chances of arbitrary things happening, like "Sir, the possibility of successfully navigating an asteroid field is approximately 3,720 to 1," or "You have a 97.6 percent chance of failure." I noticed while watching Rogue One hat some of these chances seem really hard to calculate, like whatever K-2SO said about Jyn betraying Cassian. How exactly are these chances determined?

  • How do Vulcans calculate odds?
    – Mithical
    Jan 2, 2017 at 20:04
  • Statistical analysis is a speciality of droids
    – Valorum
    Jan 2, 2017 at 20:17
  • @CHEESE - nailed it! Jan 2, 2017 at 20:36
  • 3
    That's just a scriptwriterese way of saying the odds are against the heroes. We all know that 43.7% of all statistics are made up on the spot.
    – RichS
    Jan 3, 2017 at 4:45

1 Answer 1


The new Rogue One novelisation indicates that droids determine statistical probabilities by performing "mental simulations" of likely outcomes.

With one second left until total shutdown, K-2SO chose to mentally simulate an impossible scenario in which Cassian Andor escaped alive.

The simulation pleased him.

Rogue One: A Star Wars Story - Official Novelisation

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