Would a wolf eat a mountain lion?
If it was hungry enough and happened to come upon a dead mountain lion, then yes, but carnivores usually prefer to eat herbivores (apparently carnivores taste bad). For example, African lions will kill hyenas to reduce the competition for prey, but do not eat them. A single wolf would have no chance against a live mountain lion, since a mountain lion is a bigger, stronger, faster animal with larger teeth and eighteen razor-sharp claws with which to defend itself – it would be a very foolish wolf that attacked a mountain lion by itself. A pack of wolves would be a different matter, but they would be highly unlikely to target a mountain lion as prey – as previously mentioned, predators rarely eat other predators, and even in a pack they would be risking injury taking the mountain lion on.