MlhP4a

I've received 3...THREE...rejection emails from the same school in a 2 1/2 week period. Like, I get it. I'm rejected. Please no more emails. 

Hello! I'd say you have come up with one rather strong rebuttal and one rather weak one to the arguments put forth by the author. 
But I'm replying to you mainly to say that this section on the GRE is rather complex and requires practice, and we're all grad/ Ph.D students like you! What do we know? ? It's more like a critical thinking exercise than a writing one, and I feel you'd be better off asking a professor for feedback. And read writing tips from good guides like Barron's or Princeton. Oh and the official GRE guide too. Topics for these essays are posted on the official GRE website anyway, so be sure to look that up. 
Hope I helped! Good luck