Three Mental Habits That Make Hard Debugging Harder Than It Needs to Be

A DEV Community article argues that difficult software and hardware bugs are rarely unsolved due to missing tools, but because of flawed mental habits engineers bring to debugging sessions. The three habits identified are: assuming the fault lies where the symptom appears, treating the first explanation as fact, and expecting a tool or colleague to do the thinking. The author illustrates this with a real-world example of a device dropping off a bus, where three days of driver code review proved futile because the actual fault was a marginal connector and sagging power rail. The recommended mindset shift involves starting broad, mapping all system layers from application down to hardware signals, and treating initial theories as possibilities rather than conclusions. Drawing on David Agans and Richard Feynman, the article contends that patient, evidence-first thinking separates engineers who resolve hard faults quickly from those who remain stuck for days.