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This is a great summary of the many biases that can harm our interpretation of date, turning information into superstition and mythology. Understand these things about yourself and you'll question your conclusions before they affect your test results.

This sentence summarizes why website optimization is hard: "But despite our intellect and like all earthly creatures, the mental circuitry of our biological ancestors had been optimized by evolution for a world where timeliness was more valuable than accuracy."

If I was to rename this article, it would be, "20 Kinds of Best Practices and Why They Won't Work".

It is bad news to rely on best practices that are unsupported by data or testing. This article gives you 20 reasons why.