maybe without food, but certainly not without water.
i remember a few years back there was a mining accident in austria, and a guy was rescued after 6 or 8 days, i cant remember exactly. and it was considered a miracle, since 3 days is kinda the maximum to survive without water. i remember this because everyone and his mum speculated how he survived, whether "god helped" him or maybe the rain-soaked mine provided enough moisture to keep him alive, blblabla