From Peter Jones
In Jonathon Keats’s assessment of warped maths, a more up-to-date example than damage to US bombers 70 years ago was available (21 June, p 46).
The recent observation by a top brain surgeon that cycle helmets were of questionable value related to his experience of seeing as many head injuries from those wearing them as .
He seems to have overlooked the fact that he probably saw 90 per cent of those with injuries sustained when not wearing a helmet, but only a few per cent of those who were properly equipped when they took a tumble – most of whom just remounted.
Ivy House, North Kilworth, UK
