I agree that we shouldn't assume ill intent, but we should recognize it is a very real possibility. Ill intent comes in when you realize the simple human error.

I agree that we shouldn't assume ill intent, but we should recognize it is a very real possibility. Ill intent comes in when you realize the simple human error. Alone, in your office, poring over code or reviewing past files. Then you weigh the impact on your career and reputation of honestly fessing up, and put it off for a while, then a while longer.