That's a silly question given that the main point behind practising a palaeolithic diet is to include a wide variety of foods(not just different food groups but also different kinds of meats etc.) Well, if I chose raw fatty meat only, I would end up a hospital case in c.6-8 weeks. If I chose some raw fruit or raw vegetable, I would end up suffering from my anxiety attacks again after several months and would have multiple nutritional deficiencies. Perhaps I'd settle for some particularly fatty fish. No, the only food I could handle , if stranded on a desert island, would be the whole carcasses of some large herbivore, with predigested plant-matter in its stomach.
