“And then I see that they didn't mention that it was in mode Y when they made it happen, and they did step Z on the way to get there. They may not have thought

“And then I see that they didn't mention that it was in mode Y when they made it happen, and they did step Z on the way to get there. They may not have thought that those pieces mattered, but to the developer, sometimes they do.” Exactly. You take things for granted and suddenly all your analysis work is based on incomplete or wrong assumptions .