MOTIVATING TIPS

A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.

Douglas Adams

Verified source: Mostly Harmless, Chapter 11, William Heinemann, 1992
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Why This Matters

The real sting here isn't mere mockery—Adams is exposing how rational people make a category error by assuming foolishness equals a lack of cleverness, when it actually means freedom from rational constraints. A fool unburdened by logic or social convention can spot loopholes a thoughtful designer would never imagine, precisely *because* they don't respect the intended use. Consider the person who discovers they can bypass your security system not through technical skill but by doing something so absurd—like propping open a door with a brick during a fire drill—that no one thought to prevent it. The lesson cuts deeper than "expect the unexpected"; it's that good design requires imagining minds working from entirely foreign assumptions, not just smarter ones.

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