[tempaccount9473]

Perhaps I'm being too cynical, but if PG's business model is cherry-picking busniess ideas from a firehose of potential startups, telling random strangers on the internet, "yes, you're smart enough to apply with a business idea for me to accept or reject", seems simply good business.

The cost of rejecting yet another poorly conceived business plan by a marginal candidate is less than the potential loss of billions if the guy who comes up with THE NEXT BIG THING is too shy to apply to YC.

[avenger123]

To answer the main question, you don't need to know more than what the OP posted.

The poster show's self-doubt, self-awareness, the ability to self evaluate and the ability to learn as indicated by his undergrad.

So definitely the intelligence is there. Considering the poster is most likely in their early twenties, regardless of the idea, the best thing going for the person is their runway. They have the time to fail a couple of times before other life goals come into play.

And frankly, there isn't too much correlation between business success and high intelligence. Anecdotally, it can be argued that there is an inverse relationship.