If you set a puzzle for the PCs to solve, you can bet they'll go about trying the most literal approach first.

The consequences of this for setting in-game puzzles are left as an exercise for the reader.

Transcript

Luke: So. The next step on the Path to the Dark Side is Passion. So I need to do the opposite of that.
Luke: So I should be... dispassionate.
Luke: Right. I don't care any more.
Yoda: nnnggggnnggghhhh... Try again.
Luke: Disinterest? Detachment?
Yoda: Not yet. Earn that, you must. Not merely defined by the Dark, the Light Side is.
Luke: So they're not literal opposites, then? That's your excuse?
Yoda: Examine your own thoughts and feelings, you must.
Luke: C'mon, I'm not gonna work this out by introspection. You gotta give me some clues!
Yoda: Clues just freaking gave you, I have. Hmmmm?
Luke: What? To introspect? How is that going to help?