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

I agree with 1 (I'd be surprised if anyone tried to refute it), but 2 is where your argument falls down, let's try a little substitution:

(2) I also am **certain **that paper bags on the head do offer some benefits in some accidents which any one of us could be involved in on any day.

Well actually yes, in some accidents a paper bag on the head will offer some benefits. So why not wear a paper bag on your head?