When I jaywalk (or cross anywhere) I consider it my responsibility to cross safely. If I got hit by a car, it is 100% my fault for not looking. Maybe it is also 100% the driver's fault. Responsibility and blame is not something that has to get divided up such that it adds to 100%.
In this case the pedestrian and driver are both fully responsible. The pedestrian was lollygagging across the road like a complete idiot. The driver wasn't paying attention.
I'm not saying responsibility + blame > 100%, if that's what you think I said. Read it as two statements: "Responsibility is not something...," and "Blame is not something..."
If doesn't clear things up, I don't know how it could be incoherent.
In this case the pedestrian and driver are both fully responsible. The pedestrian was lollygagging across the road like a complete idiot. The driver wasn't paying attention.