There's a common fallacy in your example in that you're asking "who" caused the accident and not "what." This is why blameless retros are important. Whenever yo

There's a common fallacy in your example in that you're asking "who" caused the accident and not "what." This is why blameless retros are important. Whenever you're dealing with who, the responsibility is never binary. There's always some responsibility someone can take for a situation they're a part of. That's good advice for life in general. The intention of the five whys is to find breakdowns at each level...not just the last one, and mitigate each.