Except Oscar wasn't dehydrated. He had worked his weight down to there by all claims. If he did dehydrate, he likely would have put weight on between weigh in and the fight rehydrating....and he didn't.

It wasn't a good game plan, IMO. I think he probably would have been better off fighting if he did cut water. Maybe not good for his long term health, but for that fight. He could have used his natural size to his advantage.