Applying to YC as a Single Founder(for the 10000th time, Again)

I know that this question has been asked here at least a Hundred times but I still have a couple of questions regarding this matter. I just noticed that the application for the upcoming semester is open and I really wanted to apply so I started reading all of PG’s posts regarding the application process and even though PG’s “How to Apply to Y Combinator” did answer a lot of the questions but I still wanted to wrap my mind around few things.

1: Does it hurt your application to not have a Co-Founder? (Since YC cares more about the founders than the idea) 2: I remember YC started “Apply to Y Combinator without an Idea” so should we spend more time on refining and defining the “About” section than the idea?

I know these are basic questions but this is my 2nd time applying to YC and I really want to dot all the T’s and cross all the I’s before submitting it again ☺

Thanks -Mr. Awesome