You are disputing that blunt force trauma to your head causes injury? Or that having a barrier between your head and the point of impact prevents severity of injury? Which part exactly are you saying isn't true?
And actually, looking at actual accident statistics doesn't do a whole lot of good due to all of the variables involved (this point was actually made by the author and is about the only one that I agree with).
And actually, looking at actual accident statistics doesn't do a whole lot of good due to all of the variables involved (this point was actually made by the author and is about the only one that I agree with).