Remember kids... always wear a helmet. (The almighty bikeradar helmet thread)

I'm going to put it this way:
If there's even a chance that a helmet will prevent you from brain injury- it is worth taking that chance, 'cos frankly, for all the Cycle Training in the world, a small fall off your bike onto you're head by a random unavoidable incident, or freak mis-clip, etc, MAY change your world irrevocably.

TO advise someone to NOT buy a helmet for me is inexcusable.

As has been pointed out, Ed did not say that.
What if there is "even a chance" that wearing a helmet will increase your chance of a serious injury in a fall? Would that convince you not to wear one? I am surprised you are being so shoddy with your talk of probability.
A friend of mine died of a head injury. He was at home, leaning back in his chair and he went too far and banged his head on the wall behind him. Had he been wearing a helmet at home to avoid this kind of injury he would probably still be alive. After all we can say there is "even a chance" of suffering a serious head injury in a freak accident in the home, it is foreseeable. Better advice would be not to lean back in your chair.
It's a crap analogy and so quite fitting for this thread.