*Oppose, leaning Strong Oppose but I can't tell if that's a shadow. This, and the other Plato pages you've already changed, exist (or non-exist) as common and proper names. Plato's allegories have survived for thousands of years upper-cased, as the references and External links show. The Cave itself is not a cave, it's a metaphor (an allegory) for the entire human condition and how we view the world with a mind that is lagging behind the accumulated data of what existence actually consists of, something Plato seems to have know from his point of view. As for the MOS, the guidelines are just guidelines, and this and the other Plato pages you've changed seem like perfect candidates for exceptions.