Nagarjuna, the second-century Buddhist logician, built an entire philosophical system on a single devastating move: showing that any concept, pushed far enough, collapses into its own opposite. He called it śūnyatā — emptiness — but the practical upshot is stranger and more useful than that word suggests. Every category you rely on to make sense of the world has a hidden seam where it comes undone. Science fiction thrillers that last — the ones readers can't shake — tend to locate exactly that seam in their central premise. Not 'what if technology goes wrong?' but 'what if the concept we used to define wrong no longer applies?' The protagonist isn't just in danger; the framework that would let them recognize danger has dissolved. That's not a plot problem to solve. It's the engine. Build toward the moment when your story's governing category — safety, memory, humanity, time — becomes genuinely undecidable, and the reader will feel the ground go soft under them in a way no amount of chasing or shooting can produce.

What is the central category your story depends on — the word you use most to orient the reader — and what happens to the plot if that word turns out to have no stable meaning?

Drawing from Madhyamaka Buddhist philosophy — Nagarjuna (Mūlamadhyamakakārikā)