That classifies a lot of medics as without a basic grounding in maths then. The origins of most of the medical "must wear a helmet" ethos comes from the red car effect. They see lots of head injured cyclists without helmets but many fewer helmeted ones and assume that's because the helmets are protecting them. They never think to look outside to see what percentage of the cycling population is wearing helmets for comparison.
Again my old friend illustrates the hypocrisy of the pro-helmet campaign.
The College of Emergency Medicine supports cycle helmets - so we should immediatley bow to this wisdom and wear them
The College of Emergency Medicine also supports the Thudguard, but in this case it isn't neccessary to bow to this wisdom and force children to wear them
Why is the advice of this "august body" irrefutable in the former case, but not in the latter?
I have yet to have any pro-helmet campaigner answer that one, and given the hypocrisy it illustrates I doubt we will.