How Do Screenwriters Justify Scenes Where Characters Talk Nonsense?

I get a kick out of how what looks like nonsense can actually be a secret shorthand in a script. Sometimes characters jabber on about odd, half-baked things and it seems like the writer lost the plot, but more often it's deliberate: the dialogue is doing work beneath the surface — showing a character's brainstorms, deflections, or emotional spillover. In films or shows where people are nervous or trying to hide something, speech fragments, tangents, and non sequiturs feel authentic because that's literally how we talk when we’re uneasy. I’ve sat in cafes eavesdropping on conversations that went nowhere and realized that same scattershot quality is gold for making scenes feel lived-in.

Another reason is rhythm and tone. A string of bizarre lines can set a mood — comic, eerie, or surreal — in ways tidy exposition cannot. Think of the odd talk in 'Twin Peaks' or the aimless banter in 'Seinfeld'; those moments create texture and let the audience breathe instead of hitting them with information. Sometimes writers use nonsense to mask exposition: characters talk in circles while the camera reveals clues, or the gibberish itself becomes a red herring. There’s also stream-of-consciousness and poetic approaches where literal meaning is less important than emotional truth.

Finally, technical choices matter. If a line seems nonsensical on the page but lands in the actor’s delivery or the edit, it can become iconic. Table reads, rehearsal, and trusting actors to shape the gibberish into subtext are all part of the justification. If I had one tip from my own scribbles and late-night script swaps, it’s this: keep the nonsense that reveals something — a fear, a lie, a relationship — and kill the rest. The weird lines that survive tend to be the ones that make you sit up, not just scratch your head.

Oddly enough, I often find that nonsense exists because life itself is messy and speech is messy, and good writers mimic that. When someone talks nonsense in a scene it can signal distraction, grief, intoxication, or a messed-up memory — all legitimate human states that tidy exposition would sterilize. I tend to read those moments as emotional maps rather than literal information: the words point to an interior landscape.

At the same time, nonsense can be a stylistic device — dream logic that invites the audience to feel rather than be told. The risk is that you lose clarity, so the best uses are those that fracture meaning intentionally, leaving room for interpretation. My practical take is simple: keep the nonsense if it deepens character or mood; cut it if it merely confuses. In the end, I’m happiest when a line that sounds like gibberish actually makes me feel something strange and specific.