Objectivist positions often have a Parmenidean air to them - existence exists, that which is not, is not, etc - so I’m interested in hearing particularly Objectivist responses to the arguments that initiated western metaphysics.
“It is necessary to speak and to think what is; for being is, but nothing is not.” -P
Rand agrees so far, as I read her. Existence exists, “nothing” is a contradiction in terms. Ok. But from this premise, Parmenides deduces frankly bizarre conclusions.
“Either being exists or it does not exist. It has been decided in accordance with necessity to leave the unthinkable, unspeakable path, as this is not the true path, but that the other path exists and is true. How then should being suffer destruction? How come into existence? If it came into existence, it is not being, nor will it be if it ever is to come into existence. . . . So its generation is extinguished, and its destruction is proved incredible.” -P
Coming into being or being destroyed imply not-being. Since not-being is impossible, coming into being and destruction are likewise impossible. Therefore change of any sort is impossible, because any change whatever must be a kind of coming into being or destruction, even if it’s only the coming into being of relational properties of entities or something.
It gets even odder from there in. Parmenides concludes that movement is impossible (it’d be a form of change), that there is only one being (for two objects to be distinct there must be something separating them, either “nothingness” or another object. Nothingness doesn’t exist - see above - and another object just passes the problem up a level - now there’s another object to explain the distinctness of), and that this being is spherical. And thinks. Also, this is all written in Attic Greek and in dactylic hexameter.
Like I said, it gets absurd fast. But this is hardly some silly rationalist puzzle that can be handwaved out of existence. Plato and Aristotle both spilled a lot of ink answering the argument. Heidegger’s entire philosophical project can be read as a reaction to it.
What might Rand have to say?