Fallacies: Q

Core idea

The letter Q is brief — two myths, both kept alive by fiction. Both ideas are vivid, both are wrong, and both show how a plot device can pass for fact.

Quicklime destroys a corpse

Detective novels taught us that quicklime destroys a body. In reality it can preserve one — as it did the victims of murderer Belle Gunness, whose remains were identifiable long after burial in lime.

Quicksand swallows people whole

Fiction depicts quicksand as a sucking death trap. In fact quicksand is denser than the human body and supports a person's weight; the real danger is exhaustion from thrashing, not submersion.

Why it matters

These are small errors with one large lesson: a thing repeated often in stories starts to feel like knowledge. The quicksand myth is even dangerous in reverse — it teaches panic when calm is the correct response.

Key takeaways

Mental model

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Practical application

What to do when you sink in quicksand

If you ever feel yourself sinking in quicksand, do not thrash. Lie back, spread your weight, keep your mouth high, and move slowly — the ground will hold you. Calm beats the myth.

Example

The thriller and the lime pit

A thriller has the villain dissolve evidence in quicklime overnight. Believing it, a reader assumes lime is forensic erasure. In reality lime slows decay — the opposite of the plot. Always check whether a "fact" came from a lab or a paperback.

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