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"And once again, Probability proves itself willing to sneak into a back alley and service Drama as would a copper-piece harlot."
Vaarsuvius, The Order of the Stick

Things happen because the plot says they should.

All fictional realities have this underlying principle to one degree or another.

It is the reason Plot Technology and Plot Armor work. It's why the hero always succeeds where many before him have failed. It's why it seems like the world's out to get the protagonist. It's why the reasonable explanation is almost never true. Reality itself is mutable before the will of the plot.

In stories where this is strong, tropes may as well be laws of physics.

Named for the principle laid out in Terry Pratchett's Discworld novels, in which this phenomenon is not only an explicit physical law, but has been codified, studied, tested, and may be the local equivalent of the strong nuclear force. In fact, it's also an element, narrativium. For example, if three brothers set out on a quest individually, and it claims the lives of the first two brothers, it is impossible for the third brother to fail.

(Incidentally, you know how we've said that TV Tropes Will Ruin Your Life? Compound this theory with reading too many Tropes and one can get downright paranoid...)

Warning: This law may not apply if you've found a missing shaggy dog.

This is at the base of things like Genre Savvy, Wrong Genre Savvy, Invoked Tropes, Million To One Chance and Tempting Fate, to name but a few.


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