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Drunk_Engineer

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99% of bike fatalities involve car crashes. There is no styrofoam helmet which will protect against that, and the VaTech test notably does not model that type of crash.

To my knowledge, the only group that tried to test bike helmets against a car is Volvo -- and all helmets failed.

My son took CS10 a couple years ago, and even I (Masters in EECS from UCB) struggled with some really obtuse multiple-guess questions he showed me on the homeworks. Much of the classwork is done in Snap, a weird and stupid graphical "programming" language. If 1/3 of the students are failing, that may have more to do with the professor.

From what I saw in the rebuttal papers, the Google cost-function is wirelength based. You can still get good TNS from that if your timing is very simplistic -- or if you choose your benchmark carefully.