Just because pigeons can deliver messages doesn't mean it's turing complete. Although they could be used in data transfer. I've never seen anybody suggest that

Just because pigeons can deliver messages doesn't mean it's turing complete. Although they could be used in data transfer. I've never seen anybody suggest that RFC1149 is Turning Complete, anyway. Game of Life is totally Turing Complete though, so it's already proven that you can indeed run Doom on it.