alfa011 said:....I cannot scientifically conclude anything but I can have an intelligent guess that maybe I will not be writing this if I was not wearing a helmet.
And here's the nub of it. Bicycle helmets do their thing by fracturing at fairly low levels of impact energy, so the fact that the helmet is in shards is a poor indicator as to whether "the same" accident would have been survivable or not w/o the helmet.
We'd get a much more sensible and scientifically less shaky debate if we'd speak about "a helmet saved my day/scalp/brow/glasses" instead of making unsupported claims about its life saving ability.
Heck, I don't need a promise that it'll save my life to wear a helmet. If it does - fine, but I'd happily wear one even if all it'd ever be capable of saving me from is getting a few stitches.