Cotchin tucks his elbow in, clenched his fist and ducks his head into the contact. That, people, is a 'bump'.
Once he elected to bump (front on from several of the camera angles I've seen of this incident, replayed over and over and over...) the onus is on him to not injury the 'bumpee'.
Delayed concussion does not save Cotchin as there have been several incidents this year alone where that has occurred. Not as a 'ploy' clubs use to keep players on the park (the clubs get hung, drawn and quartered if that's proven), but simply a medical phenonomon.
The only reason Cotchin will be rubbed out is due to having 2 strikes against him for sniping others during the season.
But I expect he AFL will seek to 'square' the ledger by rubbing out Sloane for his clash with Dangerwood.
Hey, if it's good enough for Bob Murphy to miss a drought-breaking flag win - then it's good enough for Cotchin too.