Stop Guessing: A System For Debugging Anything

Most people don’t struggle with debugging because they lack knowledge.

They struggle because they don’t have a process.

When something breaks, the default reaction is to change things and hope it works. Add a log, tweak a condition, try something else. Sometimes it fixes the problem, but nothing about your understanding actually improves, so the next bug feels just as unclear as the last one.

This guide is built to change that.

Stop Guessing is a structured system for debugging code without relying on trial and error. Instead of reacting to problems, it shows you how to approach them step by step, so you can actually understand what your code is doing when it stops behaving the way you expect.

Inside, you’ll learn how to:

• define problems clearly instead of working from vague assumptions
• trace execution to see what your code is actually doing
• form and test hypotheses instead of guessing randomly
• recognise common bug patterns and approach them with structure

This is not a list of tips or shortcuts. It’s a way of thinking about debugging that stays consistent across different problems, languages, and projects.

If you’ve ever felt like:

“I understand things when I read them, but not when I try to fix something myself”

this is for you.

— DeepCode