This is a thought experiment and something I’ve wondered about since seeing the movie “Van Diemen’s Land”. If you are unfamiliar with the movie a good summary can be found here: It is based on the true story of convicts escape, struggle for survival and finally cannibalism. As Vegans, we know we can not only survive but thrive on whole plant foods. Here is where the thought experiment comes in: You are one of the convicts. Bread has run out. You don’t know about tree cambium (edible part of trees that can sustain humans in emergency situations). You also do not recognize any of the plants. As in the movie, the convicts quickly discover they cannot hunt or fish, they must turn to plants. In one scene, one of them tries cooking some unrecognized plant leaves in a stew, swallows it and quickly gets sick and vomits it all up. So the question is: How do you choose what plants to eat?