Quote: BrisbaneRhino "O'Donnell's head is no harder than anyone else's. In a head clash it all depends on where you get hit, how hard and at what angle. As for Kirke, I hope he doesn't play this weekend. Regardless of his apparent recovery there is a lot of evidence that the brain can take several weeks to fully recover from being bruised, and another knock to the head too soon can multiply the damage. Any talk of 'toughness' when it comes to head injuries is macho bullsh*t.'"
I'm not sure that your first point is necessarily true. In the boxing world there are fighters that are much better at taking shots than others. That said, there's insufficient evidence that the same applies to O'Donnell.
Re Kirke, I'd agree that he shouldn't play for a while, perhaps not for the rest of the season. And the macho bullsh*t sentiment I very much agree with.