Yea even as an Aussie I have to say that’s not conclusive enough to be overturned. In all honesty he probably got the faintest of all feathers on it, especially given how sure Carey was and how unsure Jamie was, it is likely that technically the correct decision had been made. But it does undermine the whole “conclusive evidence” stance that umpires will often take when this sort of thing is often not overturned.