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Bad Product Fallacy

A product development fallacy where personal use cases and opinions are conflated with predictions of a product’s future success.

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Origin

Coined by technology writer and investor Andrew Chen in a January 2017 essay on his blog, arguing that personal distaste for a product is a poor predictor of market failure. Chen drew on Clayton Christensen's Innovator's Dilemma (1997) to explain the mechanism: disruptive innovations routinely look flawed or limited at launch, improving only as their markets develop — leaving early dismissers looking shortsighted in hindsight.

Updated February 22, 2026