So even if comments are flawlessly updated they are not a silver bullet. Not everyone are good at explaining confusing concepts in plain English so worst case you have confusing code and a comment that is 90% accurate but describe one detail in a way that doesn't really match what the code says. This will make you question if you have understood what the code does and it will take time and effort to convince yourself that code is in fact deterministic and unsurprising.
(but most often the comment is is just not updated or updated along with the code but without full understanding, which is what caused the bug that is the reason you are looking at the code in question)
(but most often the comment is is just not updated or updated along with the code but without full understanding, which is what caused the bug that is the reason you are looking at the code in question)