Theory

How does theory guide practical software design decisions

Theory isn't abstract—it's the mental models that help you make better design tradeoffs under uncertainty. Kent Beck explores how understanding foundational concepts in software design, testing, and systems thinking gives you reliable principles to apply when best practices conflict or context shifts.

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Questions this essay answers

  • What's the difference between following best practices and understanding the theory behind them?
  • How do I apply software design theory when circumstances don't match textbook examples?
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