Ask HN: What's the one missing detail that usually makes a bugs hard to debug?

[nishilpatel]

When debugging issues in UAT, what information do you end up recreating by hand? Logs, state, timing, data, versions, or something else?

[gregjor]

My biggest roadblocks come from my own certainty that I wrote correct code. That leads me to look in the wrong places for the bug. I have repeatedly looked right at bugs and not seen them because I felt sure that code works as expected.

[nishilpatel]

This resonates. A lot of debugging time isn’t spent finding where the bug is, but unlearning the assumption that “this part is obviously correct.”