So... because we haven't SEEN it, it cannot have happened? I'm sorry, FF, but the 'ostrich defense' doesn't work. Mel could easily be an unperson. I've yet to hear how Coldhands doesn't count. You're doing what you always do: just claim that things 'don't fit' without ever making an actual argument, because you start out by deciding x is true and refuse to deviate. In this case you've decided Brienne is an unperson and so anyone else who might fit your 'three dead people' clause doesn't count because Brienne has to be one of them. Coldhands is a perfect fit to Martin's words, especially if it turns out that he's Benjen Stark. Of course he's not a R'hllor style unperson, but Martin did not specify the 'kiss of fire' resurrection, and whatever Coldhands is, he's not a normal wight.